Island Modelworks produces a model of the NJT Multilevel in HO scale. According to the owner, an O scale model could be produced without a great deal of difficulty (3D printing), but they'd need orders for about 25 pieces to make it worthwhile (with the price inching down if orders were greater than that)
Only myself and one other person on this forum expressed the kind of interest that would have translated into actual orders. We could have got some (cab cars, at least) if we could have lined up two or three more people willing to buy four or so cars each. This was maybe a year or so ago (around the time Greenberg Shows had an event in Queens, NY...right after a near-blizzard)
That probably gives a good indication of how high a hurdle MTH would face in getting these made. Already having a ALP-46 makes an '45DP a dicey proposition too.
---PCJ