Well, the Wonder Bread isn't a 4180 airslide (it's larger ... 4566 I think), so if they want to stay proto we won't see that one.
As for the Brach's (and others) - see Tangent.
Well, MT has on occasion applied a scheme to the wrong body style if it was close enough. On occasion.
And Tangent might have been willing to pay any fees.
**Happily running my Soo line Evans Foobies
Yeah, but they look identical. I think the only difference was steel vs. aluminum construction.