I found the Zenith pn cross references with MOYER online with several Mfg. so now I am set for 1000 to 7000 substitutes. all are cheap as well.

:
::tubes I can find....
::
::BUT what about the pesty Z7000 series transistors
::part number 121-687
::
::I could use 3...
::
::who stocks and sells those? and the others?
::
::Nick
::Plano, TX
::