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Old 02-16-2017, 02:56 PM
Jon A.'s Avatar
Jon A. Jon A. is offline
Don't mess with Esther.
 
Join Date: Jun 2013
Location: Canada
Posts: 4,267
I tried Googling "tube plate cap". Found this right away:

https://www.rfparts.com/tubes/tubes-platecaps.html

There are three on the second page with different diameters, you should find what you need there. They're cheap too.
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