I haven't checked out prices lately, but if it is expensive you may want to check out the Star Wars Best of PC set. As an added bonus, you pick some pretty good games in Republic Commando, Battlefront and more if you don't have them yet.
I have a copy of the game with manual (no box) that I'd be willing to just give you... the only catch is that it's at my parents house down in Calgary. If you don't find it I could send it to you, but it probably wont be for a while at least (I'll be going down there within the next few weeks). It just doesn't run well on my computer.
(That's just for KOTOR, not that Star Wars bundle)