Well, I know I have at least one of them. Probably two.
Hopefully, you can find one from someone else though. They both just happen to be in a place which is going to take some serious effort to get at them and will have to charge for my time.....that's all.
I, too, have thrown so many of these away over the years. Why do you want to keep this system of belts, anyway? You could convert to the less annoying type.
Let me know if you run out of alternatives.