Some of the guys I shoot with use Raven holsters and recommend them highly. I know they make a very good appendix carry holster.
“It is the belief that violence is an aberration that is dangerous because it lulls us into forgetting how easily violence may erupt in quiescent places.” S. Pinker
I have been using the Phantom Light Compatible Holster for a XD40 4" with TLR-2 for almost 2 years now. It is mostly comfortable, sometimes the kydex will dig into my side a little. I fixed this with a little velcro and a sheep skin car wash hand mitt available at Wal-Mart using it as a "softer" barrier between the kydex and my body. It is a little bulky and takes a little experimentation with placement to find the sweat spot for comfort and bulge hiding. I have had to replace the belt clips a few times because they easily brake but that is to be expected. In my opinion it is well worth the wait and I would purchase another.