Kevin, I got mine from Ebay. In fact, I just found the seller, after looking up the transaction on my Paypal account. He is still selling them today:
I might try them again, but buy a used pair that have been broken in. Is there a way to tell which ones are fake, from photos of the headphones only?
That looks legit: US seller, price isn't too cheap. You could email him and ask if he's an authorized seller. Really hard to tell from pictures, other than the things I mentioned above. There are a few threads here about fake V6's and fake 7506's. You could try a search with "fake" and the model in it.