All the Target stores around here sold out of Wacky Packages 50th Anniversary Blaster Boxes really quickly, but I did get a few back when they were released. I haven't seen them anywhere else.
I only bought 3 boxes, but I managed to beat the odds and pull a puzzle sketch. I thought I'd share here.
After I couldn't find the blaster boxes, I bought a rack pack, but that was a mistake, as pack searchers bent the corners of every card in the pack.