I'd be in for a New England road name like the Bangor & Aroostook F3 AA posted by Sam or the Maine Eastern F9 done as an AA set, which also has a great look to it (IMHO).
I'd also be ok with a dummy second unit if it could be done at a cheaper price point.
That's an FL9 (note the two axle front truck, three axle rear truck). Sunset/ GGD 3rd Rail dogs these a while back.