Thanks for the response. It looks like the Polyterrain line was taken
over by Plastruct, but the products are no longer being made. The
Plastruct Web site has them listed, but they're not available. The
advice I've gotten is that even if the specific Polyterrain products
are no longer being made, the techniques shown are still applicable
using other products, so I guess I'll go ahead and list the tapes on
eBay. Maybe someone can make use of them.
Thanks again for the response.