rocky;
I agree with you IWB mag pouches are a bit uncomfortable but I'm here in Texas and it's hot 99% of the time. Jeans, boots and a tucked in shirt are the order of the day. I'll have to sacrifice some comfort in order to conceal an extra magazine.
www.pocketholsters.com and
www.kdholsters.com Pocket Defender Convertible 2-in-1 (at artz suggestion) seem like a good option for a rear pocket holster. They don't seem like they would print through and give away the fact that I'm carrying.