Yes there were 2 cassettes. I don't think my contact has them but I'll ask. If we can find them we should make a disc of each.
You should plan to come to SPAH in St. Louis in August. It will have about 40 of the best bass players in the country there. We might strike gold there for the cassettes. Also the bass seminar will be very good. Join SPAH.org, then sign up for the convention. Hotel rooms are going fast at $112 per night. I will be there from Monday through Saturday.
I started out buying the Tombo pocket bass. It is arranged in the circle of fifths. I now have a Tombo Contra Bass and the Suzuki double bass as well.