It has been discussed. The question is are people willing to pay the same price as the SD40-2 for a smaller locomotive? The current supply chain disruptions really just translate to added cost to a project. I would love to have some nice CNJ ones.
I have a Weaver CNJ 2 rail that I converted to a dummy 3rs locomotive that I will be converting back to a 2 rail powered locomotive one day now that I moved away from 3rs. It needs a new set of handrails though.