https://www.printables.com/model/759734-oreck-vacuum-tube-extension#preview
Replacement tubes are only about $15 but why spend that when I can just print them!
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That’s funny. FYI… I’m not the one who downvoted you.
Second fyi… you can post process. For sintered glass, you can print the part and then fire it either in a kiln, a furnace or an a torch.
Finally, you speak with such authority on what mere hobbyists can do. I wouldn’t put any wagers on that.