I have a Milt Sparks Summer Special for my G17. Most comfortable holster I have and wear it every day when off duty. It is very comfortable with a full size gun, doesn't pinch or bind...just sits there day after day. I have the horse hide holster, so there is a little drag coming out, but I find that very comforting as the gun NEVER slips. I practice with it all the time, so clearing leather quickly is not an issue.
I also have a COMP-TAC holster...it hasn't moved from my drawer since I bought the Milt Sparks. Hmmm...
Take a look at ebay and the other sites noted above.
Thanks
Bob