Sorry I couldn’t help more, Jon.
I have one of the Hekimian 41-01 transmission test sets here that is part of a test suite. It has 20 of those switches on it. If you decided to go the extra mile maybe someone has an old parter available but still don’t know if the switch assembly is the same as in the Tek scope. Probably not.
There is one on ePay at a ridiculous price but the photos will give you an idea as to what I am talking about. All of the indicators on the switches show black (off) & green (on).
Greg