I bought mine from Vape Dojo. I curse them for being local because I end up spending way too much money there....
I just wanted to update my thoughts on this thing. I really wish it had an adjustable juice flow. In fact, I would easily take an adjustable juice flow over adjustable air flow. With the stock silicon gasket seal that goes over the center tube, my juice does not flow well at all. When I posted my first thoughts, I had flipped the gasket upside down and the vape was fantastic. Unfortunately, the head will flood if left for an extended period of time like that (overnight, etc.). I have compromised by using the gaskets from the Protank II heads. Not as good as the upside down gaskets, but no flooding when left alone for a long time either. Adjustable juice flow would make this thing perfect.