Alright, just a quick update on this thread. Firstly, big thanks to everyone that provided input and information. Thanks to
@RobbieD for putting up some pictures, and thanks to
@alwaysFlOoReD for the same and also sending me the plate they had.
I received the plate, and I had a chance to fit it up to the transmission. It fits, pictures below. Just a reminder, this plate is stamped with MAN (assuming for manual transmission) and the number F07E-6A373-CC, in case anyone else is looking for this same part in the future.
So here's the plate leaning up against an M5OD from a 1992 Explorer. Fits pretty much perfectly.
And here is the starter for a 1992 Explorer fitting into the starter hole in the plate, also perfect fit.
Thanks again, everyone.