For some reason I always forget about those Internationals or "Peavey DynaBass . International Series" if addressing it by its Sunday name 😀
Pickups in Zephyrs and International are the same size with the same colour coding and are 4 wire humbuckers in series, dare say they are same part .
Empty shells are available for them, I've one in front of me just now👍 Instead of going the EMG road, you could grab a couple of empties and post them to one of the pickup folk for a custom build. It's surprising how affordable that can be 😎