A: I hope some of our readers can help you Phil, because I’m at a loss. I recall that Plasticville made a few pieces during the Davey Crocket craze, but that’s about it from traditional toy train sources.
There are far more choices if you look into O scale structure kits, many of which are used by 2-rail hobbyists modeling O scale narrow gauge railroads and logging railroads. A starting point would be to look at the Walthers Big Trains catalog available at most hobby shops (it shows products from a variety of manufacturers) or go to www.walthers.com and browse through the O scale structures category. Some kits are true craftsman projects but others can be assembled with a modest amount of skill.
You also could design a layout emphasizing the wide-open spaces – desert, prairie, mountains, and the like. Then you can put up mainly landscape, and won’t need so many buildings.