I don’t know how these were distributed, but I spotted this factory set of Ultraverse Series 1 cards on eBay for $5, so I figured that was a good pickup. The next week somebody sold 16 more in one auction, so that makes 17 boxes that I know of. I’m sure there are plenty more … somewhere.
I’ll keep this one sealed since it doesn’t have any cards (including the chase cards) that weren’t distributed in the regular boxes, and there are millions of those.
I know there was a factory set of cards packed in with the Series 2 binder, but I don’t know if there was one for the Ultraverse Masterpieces set. I’ll keep an eye out.