aokoye wrote:The other option would be getting the ISBN of the tapes and trying to borrow them via interlibrary loan. Note, borrowing cassettes (or CDs for that matter) via IIL is not especially common because of how easy they are to break, but you could try it and see how far you get.
I'm still amazed I was able to interlibrary loan the cassettes for "Japanese for Everyone", which have been out of print since the 1990's.
Edit: Personal opinion alert...Along with FIGS, I would say Japanese is one of the most learning-resource abundant languages out there. I wouldn't be too stressed about not finding one old resource. There are probably many alternatives that are currently available.