This mod will add 4 new lightsabers to Kotor. You'll find all 4 of them across the game.
The first lightsaber you'll find on Taris, in the under city. The second hilt is hidden on the planes of Dantooine, the third hilt you can find on Tatooine. And the fourth and last hilt is on Kashyyk the Wookie planet.

All 4 hilts have a unique little backstory and stats to match. They are a bit crazy and out there, but these are mighty special hilts, not the bog standard fair.
Check my readme file for spoilers on where the exact location is of each hilt if you're out of luck.
Enjoy!