There are a bunch of movie-style reskins, but no new models. (Except for svosh's collar fix.)
To make a robe with a completely new model would no doubt be a very hard thing to do, and even if it was was simple, I doubt anyone would do it. I've only seen a couple requests turned into mods.
Though, it does help to say "please" or "thanks".
EDIT: Wait, you're talking about KOTOR I? Come on! Try to be at least unrealistic with your requests... Making a new model like that for KOTOR I would be next to impossible.