There are alot of great IWB holsters that minimize the felt weight and bulk of a CCW piece. Having said that, the way I personally feel about my Kahr P9 is that when in a holster, you are saying goodbye to the idea of it being so thin, that it is almost unnoticeable.
I carry mine using a Clip Draw. Easy... convenient... doesn't add any weight... doesn't add to the profile like a holster would. If I wanted to add an 1/8 of leather to both sides of the gun, then stuff all that down my pants, then I would just carry my larger CCW piece(sig228). Adding so much to the gun, defeats the purpose of the Kahr.
Remember... 'thin is sexy', even if you're not!