Okay... after a little research, I found a Lionel EMD FT #158 that came with the El Capitan starter set. It is painted in the "Warbonnet" paint scheme. It is not an ALCo... which is why I was so confused.
The Lionel EMD FT's are approximately scale locos... sharing the size and heft of the Post War F3A's... but as the FT's were prototypically shorter than a F3, so is the model.
It sounds like what you want is either an O-27 ALCo FA from Lionel, Williams, or K-Line. They all made models of almost exactly the same shrunken down size. BUT: Lionel and Weaver have also made SCALE versions of the same models, so be careful.
Jon