My brother had all of his over at his mother's place... And then they vanished during one of her many moves. Might have gotten left behind in an attic or something. We're not really sure. :/ But according to my dad, he had a bunch. (And he was born in '81, so really was in the target age group when they were coming out.)

We found his old blanket in the back of a closet one day after I got into them when I was in middle/high school. The binding ribbon needs to be redone and it's a bit faded, but is in otherwise good condition.