There's no version of the Temple of Elemental Evil in Golarion, but the world is similar enough that you could transplant that site into Golarion really quite easily without much problem. In fact, I did just this for a game I'm running here at the office for the developers, where I'm running the 1st edition version of "Temple of Elemental Evil" for them.
Would you mind sharing where in Golarion you placed it?
On another topic, are you familiar with the Unchained Alternate Action Economy? It appears to me to have a high chance of curbing some of the excesses that Mythic brings with it at high levels. Have you had any experience with this new system that you could share?