I believe one of the reference pictures was of a Minitrix N Scale hopper.
It was tooled for MRC by Roco and never released under their label and it reverted to the MiniTrix “Old Timer” series.
Con-Cor did a copy of the sides on their N Scale 3 Bay hopper that was oversize for 1/160. No sure if the car ever made it into the Roco or Mehano HO trainset lines of AHM, IHC or Model Power.
