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.
"If the rule you followed brought you to this,
of what use was the rule?"
“The enemy is anybody who's going to get you killed, no matter which side he is on.” - Joseph Heller