Atlas O Master/Steam era classics are wonderful. They make great boxcars, great tank cars, and great RS-1s. So maybe it wouldn't be too difficult to deliver existing models repainted O scale offerings of:
UP Express Box Car ( in 4 different road numbers)
UP Tank Car or UP Fish Oil tank car ( in 4 different road numbers)
Illinois Terminal RS-1 (Early Black) #751
But why would they want anymore of my money?