I realize this is completely different in design, but similar in function. I�ve used this while part of a SAR team and it works well for carrying a semi-auto. It�s too small for a long barreled revolver, but a 1911 works. I realize it�s not a leather tanker, but if your point is to get something off your belt, this works well, is very adjustable, and offers additional storage for a few other items. Anyway, take a look at the radio chest harnesses:
http://www.conterra-inc.com/index.php?dispatch=categories.view&category_id=3
