O Scale

Bachmann On30, Oe or On 2.5 as it is sometimes called runs on HO track even though it is 1:48 in scale. There are more and more items being produced for this "Modeler's Scale". You can scratch build using Ho donor chassis or modify or detail a production Loco from Bachmann.
Rolling stock is readily available, we even manufacture bare "chassis" in 8' and 16' lengths. Just add some Kadee couplers and bogies and scratch build a flat bed or box for a unique item. The bare chassis are whitemetal so are a good weight.