Branden, Kahr Arms states their pistols are rated for +P ammunition. I can't make a specific IWB recommendation, there are too many variables. However, look into Crossbreed, AlienGear, Bianci and see if they have something that meets your needs.

Branden, yes, the Kahr pistol is rated to +P. (kahr.com/faq/) - Just go to the listing - click the Compatible Items link - click the Click Here for Details link - Click Holsters for a list of compatible holsters.