Best electronic ignition for driver 360?

I have Petronix on the 273 in my '64 Dart, but only because the previous owner put it there. It works okeh, but I would not choose it for the simple reason that repair parts aren't available except from the manufacturer. When a failure happens, I want to be able to walk into any auto parts store or wrecking yard, easily and inexpensively get a repair part, and be on my way quickly. And while I could double double spend spend to keep a stash of repair parts in the car, I don't like to do so unless there's a compelling reason to pick a system that requires it. Pertronix offers no such compelling reason. But yes, it does "hide" well if a bone-stock engine compartment is a priority.