89 190D Door lock wiring disintegrting

[nfokus]

Just bought a 1989 190D 2.5 (non-T), and was getting the door locks working, when one of the wiring harness connectors that plugs into the vacuum lock actuator crumbled to dust in my hand. It's a round, three pin plug, but I can't seem to find anything about it despite extensive forum and internet searching (with what must obviously be the wrong keywords)

I'd love to find a few replacement plugs with pigtails so I can continue the repair.

Thanks for any assistance!