What type of holster are you looking for?
I have a couple of P230's, and use either a Blade Tech IWB, or a Galco Executive shoulder holster, which is my favorite by far. I'm not a real fan of shoulder holsters, but this one is very different than most.
I also have a Galco ankle holster, which works well, but if I were to do it again, I'd go with Desantis. I have one of their ankle holsters for my 60/642, and its a lot more comfortable than the Galco.
You may also want to look into Smart Carry. I also have one of these, and with the right pants, it works very well, and is very comfortable. For me though, the P230 is really about as big as I want to go gun wise with this holster.
“The enemy is anybody who's going to get you killed, no matter which side he is on.”
― Joseph Heller, Catch-22