1) Anakin's lightsaber
Remember the first star wars movie, A New Hope? Old Ben gives Luke Anakin's lightsaber, which he salvaged after their fierce duel on Mustafar. Who remembers that? *everyone raises hand.* Good. Now, on the last level, The Death Star, in "Area 2" (as my guide defines it), there is a room which you can blast open, which contains Anakin's lightsaber hilt.
I don't think that counts. they have a bunch of different hilts you can pick up in the different levels, that doesn't necessarily mean that that's what happened to them. they're just there so you can pick them up and use in the game.