folks who build clocks out of NIXIE tubes.
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Working on one now. Got the tubes from Ukraine. Not cheap either!
I got a huge pile of Burroughs 5031 Nixies in a pile of junk I bot. The junk I waned and bot is worth almost nothing, I hope to get my cost out of the Nixies!
Apparently it is hard as hell to find those 7442 HV driver chips.
Now the ‘scope clocks......I kind of like those. You just have to have a high voltage shock hazard thing going all the time.
I love projects like that but they are so bloody time consuming, even if you have good electronics/soldering chops. Daunting. Challenging as to attention span. Even with my screen name.