I got my IWB for my 1911 from these guys:
http://www.wildbillsconcealment.com/wildbill/shop/
Quality is top-notch. They even bought black painted snaps to match the color of the leather. That way it's less likely to stand out.
I bought the Summer Heat model, with a FBI cant, which goes for $60.
http://www.wildbillsconcealment.com/...px?itemid=3024
Springfield XD45 is also on the list for that model holster.