Anyone make thier own holsters?

I can't find a decent semi vertical for a 239 Sig, so I'm thinking about making my own. Anyone know anything about riveting and stuff?

I like the way this guy builds his, but what are those rivets that attach a loop to the straps??Anyone?:

http://www.holsters.org/shoulder-holster.htm

Your best bet is this. Money well spent and saves time & effort and his stuff is outstanding.