There aren't a lot of mods involving masks or robes as of yet..
One problem is that so far, no one has worked out the game's models yet, meaning we can't make new ones or edit them.
This means we're limited to using existing models for the time being, though with the ability to extract the textures and convert them to TGA, and people working on the models themselves, we're getting closer.
It might be possible to find and use the mask that Revan wears in the cutscenes, but as far as I'm aware, no one has yet made this possible, but since the scenes seem to all use ingame models and such, that would tend to suggest that there IS a valid model for that piece of armor somewhere... so we shall see.
As for using the force with armor.. I could make a quick hack for you that would do the job if you like. Which in some ways would seem almost more fair, since the "bad guys" can do it. (Darth Bandon's Fiber armor anyone?) ;)
-Kitty
*Edit*
Haven't tested this yet, but it SHOULD work, and there should be no need to start a new game, so you can test this with a later-game save in which you already have force powers and the like. Give it a try, and let me know if there's any problem. Just save the file from this link to your \Override folder in your KotOR installation.
Spells.2da (
http://webpages.charter.net/ytl/spells.2da)
Cheers ;)