Just got a real nice OWB Kydex holster for my PCR from US Grunt Gear, after someone mentioned them on an earlier post in this thread. They don't have them pre-made so they don't start to make it until you order it. That makes it take a few weeks to get, which I was fine with. It fits perfectly and has an adjustable retention screw.
It was my first holster from them and I would definitely go to them again.