n-Puzzle

I am looking for the n-puzzle. Pretty please. Someone tell me where I may get them.

This and the alphabet version used to be so popular during my time.

I was addicted to it. Would carry them around with me and would furiously work my fingers to slide them into place. These pieces came with patterns printed backside. And we would religiously solve them. Some were highly insolveable. Wonder if I can solve even the simplest one now.

Wonder if the archives of my home still have them or are they broken long ago or given away?