Can anyone recommend me a place to buy good quality Persian Miniature art?

I am heading to Iran next week on vacation, and am hoping to actively shop for persian miniature art, which I am partial to. It is very rare here in Thailand, but I am told it is quite common in Iran, where this artform originated.

Is there any particular stores or shops you would recommend that produces persian miniature art of good quality? I will be visiting Shiraz, Yazd, Isfahan, Kashan and Tehran.