I've been having some fun
I don't know where I saw it, but I believe he took the contacts from the official adapter and put them either on one of the cheap turbos or he modded an official speedbooster (which you can do on your own because the eosm mount has the same flange distance as the emount). I believe it was the latter.
I can't find it right now, but he was selling them on ebay (but I found it on some forum first)