That's a great little engine. I wonder if Weaver still has the tooling. I haven't seen it show up anywhere else so I imagine the answer is yes. The good thing about that model is that it's generic enough that you can credibly paint different railroads on the side. A PRR engine with a Belpaire firebox doesn't translate well to anything other than Pennsy or maybe Great Northern, and the WM one is pretty distinctive too, being the biggest 2-8-0 ever built. The Weaver one is based on an Illinois Central prototype (covered extensively in the Model Railroader Cyclopedia), and there's nothing about it to make it look out of place on most railroads. I run mine pretty often and my only complaint is poor low speed running, but an ERR cruise would fix that. Take the old tooling, update it with some better electronics and a fan-driven smoke unit, and I bet it would sell.
MTH made a nice 19th century Consolidation a few years ago. There were two versions, one with a square firebox and one with the regular kind. I have the latter variety in Rio Grande, and I like it a lot - but maybe not as much as my Weaver Consolidation in Milwaukee Road.