I have an Aker Flatsider OWB holster. This is a picture of how it was when I bought it:
Here is how it sits now:
I cut the thumb break off of it because they just cause extra bulk and make it print worse. It serves no real purpose. The holster is well molded, and besides that, there is a tension screw on the holster anyway if you feel the need to make it tighter. I have worn this holster for about 5 hours total. I don't wear it because I really can't stand OWB carry.
If you want it, you can have it for $40 shipped. I think they sell for about $75 new. If you want to try it first, thats fine. Send me your address and I will get it to you. If you like it send me a check or Postal MO. If you don't, mail it back.