@ Don: ("never before seen") or was "this" White Lions Ace of Hearts fingerprint gaff actually in David's White Lions Gaff Deck first?
I recall there were a few gaffs of that type - but remember, the "Stealth Cards" gaff box contained only 35 of a possible 56 cards. In addition to that, I bought from Hecrob some more gaffs from White Lions that he received from Blaine. The released gaffs were only red and blue, while the extra cards came in black as well as the other two colors. If I took the time to go through them and add them up, the total variety of gaff cards will probably amount to 56.
Technically, those extra cards he got, not originally in the "Stealth Cards" pack, would not be considered as released - he got them as a gift, not a purchase. I'm thinking that Blaine is shifting away from the White Lions to the Gatorbacks and will have a whole new set of gaffs in that card back design, allowing him to release the remainder or some portion thereof of the White Lions decks and gaffs from his personal stash.
