The mod goal is to add variations of glass items in both the base game and Tamriel Rebuilt content, and to integrate new items with the game properly. I didn't want to make a shop selling all this new gear, because I think it takes away the fun of exploring and collecting stuff, which is for me one of the best parts of the game.

I didn't want to implement items as a stuff you can buy in a random shop or random place, because it feels artificial and in my opinion takes away typical Morrowind fun of exploring and looting whatever comes into your hands - if you get the new stuff instantly, you quickly lose interest with it, because you've accomplished your goal - if there is a premise of new sets lying around to be collected somewhere in the world, you have more things to do and more excuses to stroll again through beautiful world of either Vvardenfell or Mainland from TR. At least that's how it works for me lol.

Alternatively, if you disagree I've also added a separate optional mod file, where all glass items can be bought from a merchant in a rather remote location - a small island south from Dagon Fel, near Rotheran dunmer fortress. I had some fun decorating his home - the guy's name is Ireoth Arano.
Colored Glass items are added to random loot tables where regular Glass items could be found / randomly generated. This includes Golden Saints - there is a chance for them to drop both colored glass shields and weaponry.

I don't want to spoil locations of manually placed colored glass items, but those are evenly spread out throughout Vvardenfell besides Bitter Coast. I treat Bitter Coast line of Seyda Neen - Balmora - Caldera as this early game zone where a lot of players tend go to / spend their time on low levels. Also a border between Ascadian Isles and Azura's Coast is empty.

Ashlands, Telvanni settlements, Dwemer ruins and Daedric shrines are places where you tend to find colored glass items. Also areas connected to the Sixth House and spots where in vanilla game you could get access to glass items are worth checking out. It's important to note that Golden Saints will always have a chance of dropping random colored glass weapons or shields, so areas where Saints are plentiful are good spots to get the gear.
Lastly, there are minor merchants spread here and there, having one or two new glass items in their stock - no rule or theme here, it's added to provide this nice suprise when you browse goods and suddenly bump into something rare and spicy.

Less commonly, you can find an NPC using new glass weapons or armor, those however are almost exclusively NPCs that used to have glass gear in vanilla game. Most of those still use their classic green glass, but I've thrown a couple recolors here and there, where it felt apropriate.
I'm giving a list of all item locations below if you want to hunt for a particular set, but I strongly recomend not spoiling the fun - just install the mod and forget about it, from time to time while exploring you should encounter new glass items, giving you some rare collectibles.

As for TR, I focused on adding stuff to newer content - so Roth Roryn, Armun Ashlands, Aanthirin, Dagon Urul and also some stuff to older Sunad Mora and Telvanni Isles. I've left stuff around Necrom, Akamora, Sundered Scar and the South untouched. Those regions look super cool, but there isn't much to do there, because of low number of quests and dialogues in comparison to very dense and lively places like Andothren, Old Ebonheart or Almas Thirr, so I suspect there will be some expansions/reworks to them sooner or later.

From the pool of 132 new items, there are 226 items spread throughout Vvardenfell and Tamriel Rebuilt Mainland. It seems like a lot, however most of those are hidden in places either remote, hard to access or find or under watchful eye of it's owners. There are opportunities for an easy loot, but pinpointing the location where you should go balances out the big worth of glass items, and hopefuly it makes exploration more rewarding. I think it's good to install the mod and forget about it, to have this fun suprise of bumping into a rare loot on your adventures here and there.

List of Glass item locations:

Crimson Glass Left Bracer  - Kogoruhn Temple of Fey - right troth
Crimson Glass Right Bracer  - Kogoruhn Temple of Fey - right troth
Crimson Glass Halberd - Kogoruhn Hall of Maki - a table near ash statue
Crimson Glass Throwing Knife x3 - Kogoruhn Bleeding Heart - a table with 2 skulls
Crimson Glass Wakizashi  - Falasmaryon Lower Level - ash statue pedestal
Crimson Glass War Axe/Battleaxe - Assalkushalit Shrine - Hurnfing NPC  18-22 player level
Crimson Glass Warhammer  - Valenvaryon, Lurog's Hut - new chest on the right, lock 85, trapped
Crimson Glass Boots- Assarnatamat, Shrine - new chest behind Dagon statue
Crimson Glass Longsword  - Helas Ancestral Tomb - last altar, end of the tomb
Crimson Glass Cuirass- Marandus, Lower Level - biggest sleeping quarters, new chest on the left
Crimson Glass Club- Odrosal, Dwemer Training Academy - a room above Dagoth Ordos, bookshelf
Crimson Glass Shield- Yakin, Shrine - troth with other loot near 6th house bells
Crimson Glass Greaves- Yakin, Shrine - on ash statue pedestal
Crimson Glass Left Pauldron  - Mzanchend - upper room, left side, further bookshelf
Crimson Glass Right Pauldron  - Mzanchend - upper room, left side, further bookshelf
Crimson Glass Bolts x20  - Mzanchend - room right from the entrance, right side, new chest
Crimson Glass War Axe - Sobitbael Camp, Mal's Yurt - on top of the chest
Crimson Glass Club- Merchant: Molag Mar, Redoran Stronghold - Hakar the Candle
Random Crimson Dagger/Throwing  - Ghostgate, Tower of Dusk - trader Fonas Retheran
Crimson Glass Shortsword  - Maar Gan, Outpost, at smith room belonging to Alds Baro on the furnance
Crimson Glass Spear- Aidanat Camp, Abassel's Yurt - on a bedroll, covered by a pillow
Crimson Glass Towershield  - Reloth Ancestral Tomb - the biggest room, on a left altar
Crimson Glass Helmet- Ald-ruhn, Venim Manor Bedrooms - most right empty bedroom
Crimson Glass Mace- Ebonheart Ship - Chun-Ook, Lower Level - a new crate
Crimson Glass Arrows x20  - Ebonheart Ship - Chun-Ook, Lower Level - a new crate
Crimson Glass Broadsword  - Kogoruhn, Charma's Breath - last one of 3 lava rooms, a special Ash Ghoul NPC, anvil
Crimson Glass Boots- Savel Ancestral Tomb - crypt behind doors on the right, further left altar with an urn
Crimson Glass Greaves- Savel Ancestral Tomb - crypt on the left, altar with the skeleton
Crimson Glass Throwing Knife x2 - Rotheran, Arena - left side corridor at the table
Crimson Glass Dart- Rotheran, Arena - left side corridor at the table
Crimson Glass Left Bracer  - Nelas Ancestral Tomb - altar behind second door to the right
Crimson Glass Right Bracer  - Nelas Ancestral Tomb - altar behind second door to the right
Crimson Glass Cuirass- Nelas Ancestral Tomb - altar behind third door to the right
Crimson Glass Broadsword  - Zaintiraris, Shrine - wielded by Haki the Halt instead of his regular Glass Longsword
Crimson Glass Helmet Closed  - Galom Daeus, Observatory - room to the right, on a bookshelf
Crimson Glass Left Pauldron  - Dagoth Ur, Outer Facility - a room with the steam engine, middle, on top of barrels
Crimson Glass Right Pauldron  - Dagoth Ur, Outer Facility - a room with the steam engine, middle, on top of barrels
Crimson Glass Boots- Ularradallaku, Shrine - a grotto with lava, on a stone behind the brazier
Crimson Glass Cuirass- Ularradallaku, Shrine - a grotto with lava, on a stone behind the brazier
Crimson Glass Longsword- Tureynulal, Kagrenac's Library - a bookshelf behind Dagoth Tureynul
Crimson Glass Dagger- Kogoruhn, Charma's Breath - last one of 3 lava rooms, a special Ash Ghoul NPC
Crimson Glass Dagger- Subdun, Shrine - inside troth with other items

Violet Glass Longsword- Zergonipal Shrine - Malacath altar pedestal
Violet Glass Left Pauldron  - Shishara - Domed room, top of the bookshelf
Violet Glass Towershield  - Tower of Tel Fyr, Hall of Fyr - a room with Divayth Fyr, against left bookshelf
Violet Glass Tanto- Tower of Tel Fyr, Hall of Fyr - a room with Divayth Fyr, right bookshelf on a book
Violet Glass Left Bracer  - Tower of Tel Fyr, Hall of Fyr - a room with Divayth Fyr, on a left bookshelf
Violet Glass Right Bracer  - Tower of Tel Fyr, Hall of Fyr - a room with Divayth Fyr, on a left bookshelf
Violet Glass Longspear- Tower of Tel Fyr, Hall of Fyr - the biggest bottom room, against a bookshelf
Violet Glass Right Pauldron  - Tel Branora, Galen Berer: Armorer - on a bookshelf
Violet Glass Staff - Tel Branora, Upper Tower: Therana's Chamber - on a chair near Therana
Violet Glass Helmet - Tel Branora, Upper Tower: Therana's Chamber - Gils Drelas room on his chest
Violet Glass Cuirass- Shashpilamat, Shrine - right cave room, a chest to the right near the braizer
Violet Glass Battleaxe- Shashpilamat, Shrine - right cave room, a chest to the right near the braizer
Violet Glass Wakizashi- Tel Uvirith, Tower Upper - bedroom upstairs, on a desk
Violet Glass War Axe- Tel Uvirith, Tower Lower - bedroom upstairs, on a bookshelf near Reynel Uvirith
Violet Glass Warhammer- Indoranyon interior - a room with Dagon statue, by the altar
Violet Glass Boots- Indoranyon interior - a new chest near Qorwynn inside his cave
Violet Glass Spear- Ald Deadroth, Left Wing - under brazier near Azura statue
Violet Glass Shuriken x5  - Ald Deadroth, Left Wing - under brazier near Azura statue
Violet Glass Shortsword  - Ald Deadroth, Left Wing - equiped by Clendil the bosmer
Violet Glass Dagger - Ald Deadroth, Left Wing - under brazier near Malacath statue
Violet Glass Shield - Ald Deadroth, Inner Shrine - under Sheogorath statue near the chest
Violet Glass Katana - Ald Deadroth, Right Wing - under brazier near Mehrunes Dagon statue
Violet Glass Helmet Closed  - Ald Deadroth, Right Wing - under brazier near Molag Bal statue
Violet Glass Broadsword  - Sadrith Mora, Telvanni Council House, Entry - Galar Rothan room on the bookshelf
Violet Glass Right Pauldron  - Sadrith Mora, Tel Naga Upper Tower - Storage room
Violet Glass Left Pauldron  - Sadrith Mora, Tel Naga Upper Tower - Storage room
Violet Glass Halberd - Sadrith Mora, Tel Naga Upper Tower - Storage room
Violet Glass Mace - Falensarano, Upper Level - hold by Ardhil
Violet Glass Right Pauldron  - Falensarano, Lower Level - bedroom on a shelf
Random Violet Glass Throwing  - Merchant - Tel Mora, Berwen: Trader
Random Violet Glass N Melee  - Merchant - Tel Mora, Berwen: Trader
Violet Glass Dagger - Ald-ruhn, Guild of Mages, on a forge near Tanar Llervi
Violet Glass Throwing Knife  - Ald-ruhn, Guild of Mages, on a forge near Tanar Llervi
Violet Glass Battle Axe  - Ebonheart, East Empire North Warehouse, by the barrel
Violet Glass Left Bracer- Vivec, Telvanni Canton, Telvanni Enchanter
Violet Glass Dagger- Trader: Anruin Sadrith Mora - bosmer trader at the bazzar
Violet Glass Throwing Knife  - Trader: Anruin Sadrith Mora - bosmer trader at the bazzar
Violet Glass Claymore- Tel Vos, Barracks and Armory - wielded by Cania Mico, third floor
Violet Glass Wakizashi- Tel Vos, Barracks and Armory - third floor on a table
Violet Glass Katana- Tel Vos, Barracks and Armory - third floor on a table
Violet Glass Arrows x4- Tel Vos, Barracks and Armory - third floor on a table
Violet Glass Broadsword  - Sadrith Mora, Telvanni Council House, Entry - Galar Rothan room on the bookshelf
Violet Glass Broadsword  - Trader: Tel Aruhn Aryne Telnim: Smith - on his table, he is selling
Violet Glass Boots- Tel Aruhn, Upper Tower - under bed
Violet Glass Greaves- Onnissiralis, Shrine - Sheogorath statue pedestal, it's cursed with Daedra
Violet Glass Greaves- Vivec, Telvanni Vault - a table to the right with 2 chests
Violet Glass Left Pauldron  - Vivec, Telvanni Vault - a table to the right with 2 chests
Violet Glass Right Pauldron  - Vivec, Telvanni Vault - a table to the right with 2 chests
Violet Glass Club- Vivec, Telvanni Vault - a table opposite to the entrance

Amber Glass Left Pauldron  - Bthanchend - a basement room, new chest on the right
Amber Glass Right Pauldron  - Bthanchend - a room right from the entrance, bookshelf on the right
Amber Glass Shield- Bthanchend - a room right from the entrance, bookshelf on the right
Amber Glass Left Bracer  - Mudan, Central Vault - central bookshelf
Amber Glass Right Bracer  - Mudan, Central Vault - back-right bookshelf
Amber Glass Halberd - Mudan, Right Tower - by the barrel near entrance
Amber Glass Longsword- Vivec, Hlaalu Canton, Hlaalu Vault - a bookshelf under green glass items
Amber Glass Shortsword- Vivec, Hlaalu Canton, Hlaalu Vault - a bookshelf under green glass items
Amber Glass Towershield  - Vivec, Hlaalu Canton, Hlaalu Vault - a bookshelf under green glass items
Amber Glass Helmet - Vivec, Hlaalu Canton, Hlaalu Vault - a bookshelf under green glass items
Amber Glass Warhammer- Nchuleftingth, Upper Levels - inside a room just before observatory, on a table
Amber Glass Greaves- Nchuleftingth, Lower Levels - a room above lava, inside a metal stove
Amber Glass Left Pauldron  - Dren Plantation, Dren's Villa - highest room, a bookshelf behind Orvas Dren
Amber Glass Dagger- Dren Plantation, Dren's Villa - highest room, a bookshelf behind Orvas Dren
Amber Glass Dart x3 - Dren Plantation, Dren's Villa - highest room, a bookshelf behind Orvas Dren
Amber Glass Boots - Merchant - Pelagiad, Uulernil: Armorer
Amber Glass Shuriken x4  - Merchant - Pelagiad, Uulernil: Armorer
Amber Glass Glass Spear  - Salothan Ancestral Tomb - stuck into an ashpit
Amber Glass Cuirass - Arkngthand, Weepingbell Hall - room on the right from Centrifuge doors, a bookshelf
Amber Glass Boots - Arkngthand, Cells of Hollow Hand - cell with Idhdean Tailas, on a table with a book
Amber Glass Dagger - Arkngthand, Cells of Hollow Hand - cell with Boss Crito, on a metal stool
Amber Glass Club - Bthungthumz - last room, right side, a new chest
Amber Glass Helmet - Bthungthumz - last room, right side, a new chest
Amber Glass Helmet- Molag Mar, Armigers Stronghold - worn by Tidros Indaram
Amber Glass Cuirass - Molag Mar, Armigers Stronghold - worn by Tidros Indaram
Amber Glass Boots - Molag Mar, Armigers Stronghold - worn by Tidros Indaram
Amber Glass Dagger- Molag Mar, Armigers Stronghold - worn by Tidros Indaram
Amber Glass Broadsword - Gnaar Mok, Arenim Manor - near Drarus Berano on top of the chest, top room
Amber Glass Claymore - Lower Level of Deserted Shipwreck near Mzahnch - near the skeleton
Amber Glass Mace- Vivec, High Fane interior, wielded by an Ordinator
Amber Glass Dai-katana- Vivec, St. Olms Storage, in the biggest storage room, on the pile of boxes
Amber Glass War Axe- Trader: Suran, Garothmuk gro-Muzgub: Smith
Amber Glass Battle Axe- Endusal, Kagrenac's study - room with Dagoth Endus, on a dwemer cabinet
Amber Glass Club- Endusal, Kagrenac's study - a room with many desks, near the mech torso
Amber Glass Shield - Ghostgate, Tower of Dusk Lower Level, Smithing room, top of the crate
Amber Glass Cuirass - Ghostgate, Tower of Dusk Lower Level, Smithing room, bookshelf
Amber Glass Left Bracer- Ghostgate, Tower of Dusk Lower Level, Smithing room, bookshelf
Amber Glass Right Bracer  - Ghostgate, Tower of Dusk Lower Level, Smithing room, bookshelf
Amber Glass Halberd - Ghostgate, Tower of Dusk Lower Level, Vault, bookshelf
Amber Glass Greaves - Ghostgate, Tower of Dusk Lower Level, Vault, bookshelf
Amber Glass Dagger- Ghostgate, Tower of Dusk Lower Level, Vault, bookshelf
Amber Glass Cuirass- Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Greaves- Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Left Pauldron  - Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Right Pauldron  - Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Boots- Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Shield - Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Dagger- Ghostgate, Tower of Dusk Lower Level, bedroom, worn by Salyn Sarethi
Amber Glass Dagger- Tel Vos, Central Tower - dwemer exhibition table
Amber Glass Dart- Tel Vos, Central Tower - dwemer exhibition table
Amber Glass Longsword- Andasreth, Lower Level - a room with dead Redoran Warriors, on one of corpses
Amber Glass Shortsword- Aran Ancestral Tomb - middle square shaped room, on top of the left altar
Amber Glass Warhammer- Mzuleft - room with magma on the far right, left side bookshelf
Amber Glass Left Bracer  - Shara - last room, upstairs, a new chest near a bookshelf
Amber Glass Right Bracer  - Shara - last room, upstairs, a new chest near a bookshelf

TR
Amber Glass Longsword- Andas Estate: Manor
Amber Glass Shield- Andas Estate: Treasure Vault
Amber Glass Dart x3- Old Ebonheart, Imperial Archeological Society - dwemer section near schematics
Amber Glass Club- Northern Wind ship near Mannizache or Bal Oyra - lower deck on a dwemer desk
Amber Glass Right Pauldron  - Barzamthuand, Halls of Muk - northren sector, second floor, engine room, desk
Amber Glass Dagger- Barzamthuand, Halls of Muk - northren sector, second floor, small bedroom, table
Amber Glass Left Pauldron  - Barzamthuand, Halls of Muk - eastern sector, third floor, inside a metal barrel
Amber Glass Staff- Barzamthuand, Observatory - second floor ring, on two barrels near the big chest
Amber Glass Right Bracer  - Hendor-Stardumz, Cog Tower - on the table
Amber Glass Greaves- Hendor-Stardumz, Halls of Bluthanch - east side, a tiny room with desk, inside chest
Amber Glass Right Bracer  - Hendor-Stardumz, Halls of Mzanfelech - top most small room, on a bookshelf
Amber Glass Towershield- Hendor-Stardumz, Halls of Mzanfelech - southern-most room on the desk
Amber Glass Battle Axe- Bthalag-Zturamz, Foundry - left side of the first room, lying on an anvil
Amber Glass Left Pauldron  - Bthalag-Zturamz, Foundry - behind vault doors, a bookshelf straight from entrance
Amber Glass Right Pauldron  - Bthalag-Zturamz, Foundry - behind vault doors, a bookshelf straight from entrance
Amber Glass Shield- Bthalag-Zturamz, Foundry - behind vault doors, a bookshelf straight from entrance
Amber Glass War Axe- Nchulark - a square room wtih corpses of Magus Perde, inside a stove
Amber Glass Longspear- Ratharzak - a tower room with Falvani Theras, on a table with Old Dwemer Book
Amber Glass Halberd- Helnim, Imperial Archaeological Society - top floor, display case in the room corner
Amber Glass Dai-katana- Tower of Tel Mothrivra, Manor - a table behind Talmeni Omothran
Amber Glass Wakizashi- Tower of Tel Mothrivra, Manor - a table behind Talmeni Omothran
Amber Left Glass Bracer- Chunzefk, Ruins - main room, the middle with a stack of metal barrels, on table
Amber Glass Tower Shield  - Chunzefk, Ruins - main room, the middle with a stack of metal barrels, on table
Amber Glass Warhammer- Bazhthum, Craftsman's Hall - a table on the right
Amber Right Glass Bracer  - Bazhthum, Craftsman's Hall - top of the barrel on the left
Amber Glass Boots- Bthungtch, Basilica of Nfund - circular chamber with water, left side, on barrels
Amber Glass Broadsword- Bthungtch, Basilica of Nfund - a room on the left inside a metal bucket
Amber Glass Greaves- Leftunch, Hall of Sun's Height - behind Steam Colossus, small room, a dwemer chest
Amber Glass Cuirass- Leftunch, Hall of Sun's Height - behind Steam Colossus, small room, a dwemer chest
Amber Glass Boots- Leftunch, Hall of Sun's Height - behind Steam Colossus, small room, a dwemer chest
Amber Glass Helmet Closed  - Ngelfltingth - tower room with Sathram Volos, on a chair
Amber Glass Tanto- Ngelfltingth - tower room with Sathram Volos, on a desk
Amber Glass Mace- Andathril Ancestral Tomb - a room with Ogrim, through long corridor, replaced green
Amber Left Glass Bracer- Andathril Ancestral Tomb - a room with Ogrim, on an altar

Violet Glass Broadsword- Horaren Manor, top floor storage - a shelf above a chest
Violet Glass Shortsword- Tel Drevis, Tower - wielded by Vela Heleran
Violet Glass Tanto- Sehutu, Sanctum of Souls - old quarters to the left, near glowing crystals and a hammer
Violet Glass Helmet Closed  - Sehutu, Sanctum of Souls - old quarters to the left, under bed behind a sack
Violet Glass Left Bracer  - Tel Rivus, Andvaryon: Laboratory - a shelf near 2 soulgems
Violet Glass Right Bracer  - Tel Rivus, Tower - a bookshelf near Nira Uldram
Violet Glass Cuirass- Ulanababia, Shrine - levitate upstairs to Physa, on a stoneblock behind her
Violet Glass Longsword- Manrizache, Hall of Arthand - straight from the entrance, on a bench near walls
Violet Glass Boots- Manrizache, Hall of Arthand - left from the entrance, on a barrel, near a table
Violet Glass Left Pauldron  - Yamuninisharn, Shrine - first big room on a stone table with candles
Violet Glass Left Pauldron  - Yamuninisharn, Shrine - first big room on a stone table with candles
Violet Glass Helmet- Baelkashpitu, Shrine - ceiling near Molag Bal statue left impaled skeleton's head
Violet Glass Tanto- Tel Ouada, Tower - a table near Tabad Vems, on a platter with soulgems
Violet Glass Dai-Katana- Tel Oren, Tower - a room to the right with glowing crystals
Violet Glass Broadsword- Firewatch, Ember Keep: Wizard's Tower - a display glass furniture near Selura
Violet Glass Throwing Knife  - Firewatch, Ember Keep: Wizard's Tower - upper floor, a bookshelf near a soulgem
Violet Glass Club- Firewatch, Ember Keep: Treasure Chamber - on a shelf display
Violet Glass Cuirass - Firewatch, Ember Keep: Treasure Chamber - on a display velvet pillow
Violet Glass Dart - Firewatch, Ember Keep: Treasure Chamber - a high shelf above boxes on a red cloth
Random Violet Glass Armor Piece  - Firewatch, Ember Keep: Treasure Chamber - a new chest in display room
Random Violet Glass Armor Piece  - Old Ebonheart, TEM Princess Morgiah: Hold - lowest deck, near stairs in a barrel
Random Violet Claymore- Onimushili, Outer Halls - lowest room on alchemical table
Violet Right Glass Bracer  - Tel Aranyon, Upper Tower - guard sleeping quarters on a stack of pillows
Violet Glass Battle Axe of Dagon - Ebamusharisus, Shrine - an offering on a platter under the statue of Mehrunes Dagon
Violet Glass Greaves- Ossurnashalit, Shrine - behind Molag Bal statue on top of the chest
Violet Left Glass Bracer  - Andothren, Hlaalu Council Company Bank - vault room on a shelf to the left
Violet Right Glass Bracer  - Andothren, Hlaalu Council Company Bank - vault room on a shelf to the left
Violet Glass Shield- Andothren, Hlaalu Council Company Bank - vault room on a shelf to the left
Violet Glass Shield- Port Telvannis, Telvanni Council House: Vaults
Random Violet Throwing/Dagger  - Trader: Port Telvannis, Aresthi Brendu: Trader
Violet Glass Bolts x6- Trader: Port Telvannis, Aresthi Brendu: Trader
Violet Glass Shortsword- Llothanis, Bal Gernak's Manor - a room with Grimdil the bosmer, on a bookshelf

Crimson Glass Shortsword  - Ikinammassu, Shrine - under a ruined daedric statue, lying under a rock, hilt vibile
Crimson Glass Dagger - Hadrumnibibi, Shrine - wielded by Silhaenil standing near Malacath statue
Crimson Left Glass Bracer  - Hadrumnibibi, Shrine - on a limeware platter near Malacath statue as an offering
Crimson Right Glass Bracer  - Andarannipal, Inner Shrine - on a wooden table, on The Book of Daedra
Crimson Glass Dart- Hlorandus, Underground - a room with 3 pairs of doors, on a table with loot
Crimson Glass Shield- Ald Uman, Inner Shrine - on altar under Malacath statue, next to glass longsword
Crimson Glass Right Pauldron  - Hummurushtapi, Shrine - under Malacath statue
Crimson Glass Greaves- Port Telvannis, Telvanni Council House: Vaults
Crimson Glass Left Pauldron  - Port Telvannis, Telvanni Council House: Vaults
Crimson Glass Tanto- Port Telvannis, Telvanni Council House: Vaults
Crimson Glass Longspear- Malawius Camp, Addun's Yurt - spear in a hand of the skeleton in a cage
Crimson Glass Dagger- Ishanuran Camp, Askhan's Yurt - on a stack of pillows under a bench
Crimson Glass Cuirass- Essarnartes, Shrine - second floor at alchemist table near red candles
Crimson Glass Helmet Closed  - Firewatch, Ember Keep: Treasure Chamber - on a display velvet pillow


[Optional] Glass Shop location:

!Spoilers! - a map of locations where you can find Glass items:

Also a huge thanks for the help from Discord modding community, especially to Greatness7 for fixing position of my items and help with setting up Blender plugin / Nifskope for Morrowind modding.