Have you tried ebay or amazon? I found some old hamburger presses and containers on ebay that I had been looking for, for a long time. Ebay is loaded with older Tupperware products.
Well, I have a really nice mold; I want a recipe for it ;-)
This is the one I have, from the thrift store; I like it because it looks lit it will unmold easily:
http://jellomoldmistress.com/2009/06/15/tupperware-jel-ring%C2%AE-mold/
I think I’ll get the book at the link.