This mod will add 4 new lightsabers to Kotor. You'll find all 4 of them across the game.
First lightsaber you'll find on Telos, the under city. Second is hidden on the planes of Dantooine, the third you can find on Tatooine. Fourth and last hilt is on Kashyyk the Wookie planet.

All 4 hilts have a unique little backstory and stats to match. Nothing severly game breaking though. Check my readme file for spoilers on where the exact location is of each hilt if you're out of luck.
Enjoy!