"FM H20-44 in original Raymond Loewy design. As far as I know, no one has made a H20-44 in O in any style, but prefer the original design. While only 96 were made, the PRR, NYC, and UP had them."
P&WV had at least one. The Carworks made nice brass models of the H20-44 and H16-44 in the 90s I think. You still see them at shows even new in the box. I don't know about versions of the H20-44, but they did the H16-44 in 3-4 versions including one for PRR with Antennas and C-liner trucks and square cab windows. They also did some Alco Switchers, Baldwin Switchers, and I think an RS-1 the models are nicely detailed. the Baldwin VO-1000 was also done in multiple variations.
All Carworks stuff had single motor Weaver style drives.
Not sure how many more of these would be wanted.