You might consider contacting pat mason at mason racing ignitions. Pat was vertex magneto’s head engineer when vertex was in blue bell, Pennsylvania. He builds, rebuilds, repairs and restores every kind of ignition you can think of. He is quiet, knows what he is doing, does excellent work, fair prices, and his shop is immaculate. The first time I used him I could not believe how neat and organized. His shop was a veritable whose who of vintage ignitions. He may very well have some options for you.
http://www.masonracingignitions.com/Call, don’t email him, it’s old school. That is pat on the left and my son on the right last summer after pat re did my decades old 235/261 Chevy vertex that I had not run since the middle 90s. Pat serviced it all up, works perfect.
