I just received this thing from Japan, which I bought in an eBay auction last week (the pics are from the auction, not my own):
It's basically just a sheet protector, but it's very glossy and high quality, so I can frame one of the sides at a time for display.
The odd thing is, there's fine print at the very bottom of one side which says, in English, NOT FOR SALE. So I'm assuming this came from some set or something, though I have no idea how to find out.