Yeah I doubt they’d have any copies, but maybe they’d know who to contact. Or maybe see if they remember anyone who was involved with the technical side. Those people might know where archival copies are stored.
Have you tried the library of congress, Smithsonian, and internet archive? Not site searches, but contacting an actual archivist or librarian at those institutions.
https://en.m.wikipedia.org/wiki/Marion_Stokes