1970 dart 340 rally gauge reg/limitor

Hello I'm trying to find a new voltage limitor/regulator. I have a 70 swinger 340 speed car. I just got my dash and gauges redone and dont want to fry my gauges. I can't find a limitor regulator that looks like the one in my car. Mine has 3 prongs close together than 1 more a little lower. For a total of 4. Can't find this piece anywhere.....please help thank you