Ok, silly thing really, apparently this was only for the Nordic hotels (Finland, Norway, Sweden & Denmark), and they just put the Demonic Sheep back in the shop to let people buy the remaining ones (so there's still a total of 30, they weren't sold out last time).

...except for Finland, where all 30 were sold the first time, and now they re-released it there with a "Sold out"-tag from the very start so pretty much a useless re-release haha. NO, SE and DK are still fine though, they still have plenty left and never seem to sell out.