I sutumbled acrost this DIY Kydex holster. I'm not sure I like the way he just uses the Kydex to form the belt clip, but other than that they look great. The guy said it cost about $10 and 2 hours a holster.
If you don't like the integral belt loop you could always cut in some belt slots. Either way that's a nifty project and it came out nice.
Yeah I thought of that. I was also thinking along the lines of ordering clips from Crossbreed or somewhere like that and bolting them on. I'm not sure how you would do that where the nut wasn't exposed to the firearm though.