At least with one of the factories in Russia, Electro-Harmonix ended up buying them when they were in financial trouble, just to secure their supply of tubes. I

At least with one of the factories in Russia, Electro-Harmonix ended up buying them when they were in financial trouble, just to secure their supply of tubes. I'm sure the current situation with Russia has messed that purchase up (it was done years and years ago), but they probably still need tubes, as they have products they still manufacture that require them!