About a dozen or so years ago I was in search of Septa Regional Rail Silverliner cars. I came across Philly’s own IHP company. They started out with just making the shells. The cost was about $250 and there were few takers and they abandoned the O scale project.
Now they are making them along with the almond joy El cars and the Kawasaki street cars in the smaller gauges. Here’s the link if you’d like to check them out.