I don't know for sure how he's getting ahold of them (and I really don't care, that's his business). Let me pose to you, however, a potential situation that could explain his actions:
He has a friend, who works as USPCC, and is not supposed to make the uncuts available. However, this friend, has spoken with his boss and asked if he could sell a few to a friend. With permission, he is allowed to sell "a couple" uncut standard rider backs. EZ, recognizing the opportunity and wanting to provide the community with something that has clearly been sought after, proposes that he will acquire them for anyone interested.
As I said, this is a proposed scenario, but if this were the case, no one would blame him for keeping his source undisclosed as well as wanting to at least make a LITTLE profit on it.