Imho due to its size and the variety of models out there of this experimental locomotive, mth would be foolish to spend money on tooling for this model. The scale Lionel versions have excellent detail and I can't see anyone improving scale models already out there from Lionel and sunset models.
Us PRRSPF's can use a b8a shop switcher, a 2-8-8-0, a d16, a USRA n1 2-10-2, a g3, an f1, and other prr steam classes that haven't been made.