Hot Rods Looking for a really small alternator.

This alternator has developed a 4 amp leak back through the regulator. I took it to an auto-electric shop and they confirmed my check. It's putting out it's rated amperage, but when off it bleeds back, draining my battery over night. The guy told me that these alternators are sold by many different companies and they all have their own 'priority' regulators, he said if he could find one that matches it'd be more than the alternator is worth. I'll run it with an 80 amp diode in line until it gives out, then buy something better.