There are plenty of mods to give you Darth Revan's outfit as a usable armor, but it's kind of surprising that I've never seen a mod that gives you the mask as a separate equipment piece. I know something like that doesn't exist in the game files, but perhaps some industrious modder out here could make a reskin for an existing headpiece? There's one piece of equipment that looks a lot like Revan's mask already (Force Mask, I think?), I bet it would be relatively easy to recolor it- if possible, maybe add a mesh that replaces the back of the head with a black texture in place of the hood?
In a similar vein, it would be cool if something similar could be done with Darth Nihilus's mask. You can take it as a trophy at the end of K2, but I thought it kind of a bummer that you can't actually wear it. I'd be happy with a something that adds a piece of equipment to your inventory after the Ravager fight, but it'd be awesome to have a mod that adds it to K1.