Aliengear has a new modular holster that looks really interesting now. It does IWB, OWB, and appendix with a promise of more options, like shoulder and drop leg kits, in the works.
My SIL has had an Alien Gear IWB holster for a couple of years and wears it daily. It conceals his compact pistol very well. I recently purchased an OWB Alien Gear rig. I have only worn it to train, so far, but it seems like quality. The Shapeshifter is their new IWB/ OWB rig. It is an interesting idea, that you can buy one system and change it up from IWB to OWB.