I also thought of Seinfeld right away, lol!
I couldn’t find these whenever I searched for them in stores. However last Christmas someone surprised me with some. They found them in the wild. But only one of each. They think maybe it was at a Target store but don’t remember.
Seems like the second wave of these had way less of supply than the first wave. I still have never seen them. I would think eventually some would show up on eBay.