Eric --
I didn't get any PM responses.
There is one ebay seller ("GrouchyOldMan," I think) who deals in these sets including those made by "Superior"
Every once in a while I check on them but I've mostly given up.
The cards that Superior made are really nice as such cards go.
See
https://www.tcdb.com/ViewSet.cfm/sid...all:-1876-1976