These were put out by a New York company for the Hall of Fame to be sold in their shop and at big league ballparks. They did these in two series and the second series is scarcer, at least according to what I've read. The Babe is among the cheaper ones.
I doubt I'll try to find any more of these as my display space is pretty crowded already. So much so that I've taken to rotating bobble heads was the sports seasons change.