I have no doubt that Hoover don't produce these bags and belts any more. We are just buying old stocks that were made several years ago. Once these stocks run out that's it.
Of course, there are still other stocks made by Electruepart, Qualtex and others, but I bet these aren't in production any more either, and we are just running down old stocks.
As stocks run lower, people will no longer own TP2's as they cant get brushrolls and other vital parts for them, so they will get binned and recycled. In the end there will just be those models in the hands of collectors, that never get used for fear they will break down and wont be able to be fixed, and thus they become ornaments and museum pieces.