I'm also interested in following this one. I saw these adapters for sale on eBay too. Honestly, it only looks like there were a few auctions going on at a time for them, though. A couple were from an eBay account in China with 0 feedback, so I skipped right over those. I can't see how anyone would want to gamble on PayPal'ing over hundreds of dollars to a Chinese account with no previous transaction history?
I'm tempted to try to bid on one that's offered there by someone with a much better feedback score, though. In my situation, I only have one location in mind where I want to use the DC charging. (We have a free CHADeMO charger available to use in one of the shopping strip malls near where I live. I find myself shopping at one store or another there at least 4 times a week, and I go right by its highway exit every time I drive in to the office. They also offer a free ChargePoint charger there, but that one charges my Tesla so slowly, it really only winds up giving me about 20-25 miles of extra range if I spend 1-2 hours there.)
I'm in the unfortunate situation where I can only charge at home with the 120 volt outlet at 15 amps. I have a detached garage that was only wired up for that, and my 200 amp electrical service in the basement is pretty much maxxed out already since we have 2 heat pumps and an all electric home. The electrician who examined everything told me I'd be looking at $7-10,000 to do everything needed to get a better circuit out there under the circumstances. (Even the existing ground wire on my electrical box was put in back in the 1960's and won't meet code today, so that would need to be redone as part of the project too.) So I'm always looking for a strategy to charge my car as much as possible on free chargers around where I live and work, so at home overnight is just "topping it off".
I could justify spending $250 or so on a CHADeMO adapter just for use at that one charging station if the thing works properly with it. But I'd love to know if these things on eBay are turning out to be in OEM Tesla packaging first.