For good OWB revolver holsters I like Fist. They can make a holster for just about any model gun, not like some of the newer makers who don't have a lot of revolver molds.
I had a couple of the model 12's and they're a great value for the price. FIST, INC.
But they make a ton of other models in different styles too, and the delivery times aren't bad. Good luck.