I've not had any experience with that particular connector, but I have dealt with the ones that the 1Z/AHU used on that bracket on the cylinder head, where the glow harness (and other wires) go through. It is similar I think, but it's been a while. I know I found something in my kit to work. I don't have any exposed M-unit connectors here right now or I'd take a better look see.
I might soon, though (I've often got the front off of something, a transmission out of something, or whatever....often on an 02E-equipped car).