IAJJ endorses only two holsters: the Vanguard 2 from Raven Concealment (http://www.ravenconcealment.com/holsters/vanguard-holster-systems/vanguard-2-holster-full-kit ) and the Keeper invented and made by my good friend, Spencer Keepers. Not only is he a great holster maker, but he is one of the finest pistol shooting instructors on the planet. Here is a link to an in-depth review of his holster.
Do yourself a favor. Get a VG2 (if you shoot Glocks or M&Ps) and a Keeper (for most popular pistols), and never look back .
You can contact Spencer for info/ordering of the Keeper, or get info on his shooting courses, at: Keepersconcealment@gmail.com