I wouldn't be surprised if either road had a few PS-1s, either 40 or 50 ft, so MT, Athearn, and/or Atlas could all make one in the pre-merger schemes. MT and Atlas have made special runs before, and neither are strictly prototype manufacturers, so it wouldn't be a stretch for them.
Besides, if the V&O has an historical society, it would seem to be as "official" as any 1:1 railroad...