WTB Zenith T-O G500 Volume/On-Off Switch

I am starting my first restoration of a radio (was all jukeboxes before).
I have a G500 (chassis 5G40) Zenith Trans-Oceanic Radio.

In looking over the components, I found I am in need of the
Volume On/Off Switch

I am looking for:
IRC 76-2 (switch)
and
IRC Q11-137 (1M Audio Control)
OR
Zenith 63-2037 (combination of both IRC parts)

Anyone know where I can get this (these) Parts?

TIA & Have a Happy & Safe 4th of July (US) or 1st of July (Canada)