I wish there was a parts list for this! One of the problems that took so much effort in tube lifetimes were the coatings used. I'm wondering what types of coatings he's using. Need more info!
I'd be interested to learn more too. Old methods of tube production produced a lot of waste like Mercury and other toxic (carcinogenic) byproducts. I believe modern production methods (where they still exist) are better, and I bet this subject would make an interesting video/read in its own right.