Enterprising French amateur Claude Paillard , F2FO, creates beautiful modern vacuum tubes by hand in his shop. These would be effective as an 01A replacement or similar in an early radio.
https://www.youtube.com/watch?v=EzyXMEpq4qw
It’s a real work of art. Check it out!
RETROVOLTAGE 
Incredible craftsmanship. Thanks for sharing! Does he still make the 6v6?
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This is amazing! I’m somehow aching to get a homemade 6v6 now though.
That is one of the most excellent videos I’ve seen. Thanks for sharing it.