Jeeez, I've searched through everything I have - 2ed, 3ed, Scarred Lands, unofficial stuff even, and...NOTHING !! Was I hallucinating or something ?? I am damn certain there was a weapon (at this point I begin to believe it might have been a spell...) that dealt a set amount of damage, you didn't add your Str bonus to it and it dealt force damage.
P.S. I don't have any Star Wars material, so if someone could tell me how the lightsabers work I would be most grateful (maybe I flipped through a SW book at some point and noticed it there...)