@Dave Koehler posted:...snip... There was one produced in brass a number of years ago, if you find one expect to pay a couple of thousand for it, ( a U.P. prototype) ...snip...
There was one produced by Ken Kidder in a long-hull and a short-hull version, sometime during the late fifties/early sixties; I have one of the short-hull versions. Many years later, Precision Scale produced a run of McKeens (including the short trailer); they are the ones that go for megabucks. Here is my MG/KK/USH(?) one:
I had read somewhere that the car was actually more aerodynamic when running in reverse; when these were designed, aerodynamics was a basically unknown field. There was also an interurban car called a "Windsplitter" that the Stark Electric (Stark, OH) had a pair of. Theirs had a flat rear end with the boarding/alighting door located there. One day they "met in a cornfield" and were rebuilt into conventional cars.