The quest to get the guaranteed full set of Leather Scout Armor is interesting, but the starting location is somewhat curious, being in the Cliffside Retreat which is in the middle of the wilderness and requires you to get out of your way to get it.

A new location was decided: Markarth's Guard Tower. You will still need to know the location to get it (like some other CC quests), but it will be easier to get and not require a long walk/ride. This also adds an actual reason to go to the Guard Tower.

The items added to the area are both the note that starts the actual quest and the dossier the note is talking about, which was next to the note in the original location.

Finding the note
Enter Markarth's Guard Tower, go down the stairs, enter the room and check where the lamp to your left.

Requirements
Requires Alternative Armors - Leather from the Creation Club for obvious reasons.

Compatibility
I disabled the original note and guard dossier at Cliffside Retreat, so if you have another mod altering their objects in the world, the only thing that will do is likely enable them and you will have a duplicate of the item. Contents of the note and dossier were not altered in any way.

For the sake of compatibility, I did not change the quest itself (which means the journal still says that you found the note at Cliffside Retreat... maybe you can interpret that the Guard Tower is the retreat at the cliffside?).