It would seem that since he hasn't gotten permission (or should that be Permission?) from the Tolkien Estate to make it, he is not allowed to sell it. But in the link you shared, he talks about going to England and putting it on their table so maybe he's planning to give them the original to exhibit and maybe having it put into print as a super-deluxe illustrated edition.
I am rather miffed that the interviewer didn't ask obvious question of "How do I put my paws on my own copy!?! Must own the precious!"