We have a bunch of those at our head shop (Battle Creek,MI), but I suppose that doesn't help you out. I didn't know they had gone out of business though?
Zong! Toy Co. did go out, but they are back, there are a couple at a shop near where I live. I haven't ever seen any online. Check out Sour (see my sig). hope this helps and keep it real, Zongs are the best IMO!
Zong toys did go out during operation pipe dreams, you know when tommy chong got busted? but they're back, and are the best zongs, but u can find non brand zongs anywhere