Jack,
I remember my 'adventure' with an Austin-Healey ignition switch electrical fire behind the panel. And the Jag V12 that would just stop because of electrical problems.
I see that McMaster-Carr also carries high-Amp swiches 16, 20, and 30 amps at 30VDC. They all have metal toggles and not the plastic. I need to look at mine and try to match the toggle lever. Olthoff has new ones, same company. Some new cars come in DOA fuel pump switches. They R&R the switch. I'm told the 16 amp is good to use as the switch is hooked to a relay.
Steve, now that I'm through with the ISO 2001 re-certification, I have some time to call. Let me know when is good for you.
Regards
Grady