The few PF DMs I know who do allow 3pp material will almost always only allow Dreamscarred Press - since they're apparently the only competent 3pp. If you don't know what I mean, go take a look at the Eldritch Godling class on the PFSRD - both heavily convoluted and absurdly overpowered. Even if you bit the bullet and decided to DM for your friends, I'd still warn you against giving them an open invitation to use 3pp - almost all of it is terribly balanced and/or poorly written.  If, however, you are only looking at Dreamscarred Press, though, hit me up. I've wanted to run a Wuxia campaign that utilizes the Path of War classes for some time now.