Momentary Toggle Switch

[Robert/Texas]

I plan to install Airtex fuel pumps on my 34 and 37 Fords. Both cars need priming after 10 days or so of nonuse. I want to retain the mechanical pumps and just use the electric pumps for starting or when I get vapor locks. I’ve been looking for momentary switches in hardware, auto parts and tractor stores with no luck. I’ve found some on-line but without being able to examine them I’m reluctant to go this route. Suggestions on where to get these will be welcomed.
Thanks, Robert