Hi Russ,
I've tried 5 auto parts stores plus Lowe's, a local hardware store, electrical supply house and Radio Shack.
Radio Shack had the closest with a 14 volt version. Was reluctant to try this because of the higher voltage would mean lower wattage and less brightness.
By the way I got the Flash to Pass wired in and finally working.
My first pass at testing the flash would work, but when the light switch was on, the relay would not latch the high beams.
Turned out to be a defective brand new relay.
Rob