But I thought some were 'name changes' or corrections to spelling
A couple of years ago some came on ebay in something like 4 lots of 15. I believe I counted 16 chips total that were not in the 64 set, which would mean 80 in total. I got outbid on all of them, the cheapest went for $80.
I seem to remember either Doug Smith or Don Lueders bought one or more of the lots. Perhaps they could tell us how many different they have?