Most, if not all, of your custom holster makers should be able to make/offer a holster for the PF9. You might want to visit the Kel-Tec Owner's Group (KTOG) and post your question there as well: http://www.ktog.org/cgi-bin/yabb/YaBB.cgi.
Go here: http://www.palehorseholsters.com/in_stock.htm , scroll down and you'll see that they have Speed Scabbards (RH) for the PF9 in stock. Then check-out the Gallery--scroll way down and click on the pic. It's lightweight, thin and well made...also a really good price. I waited three months for mine to carry a Kimber Ultra compact and love it (obviously, I guess, as I'm recommending it!)