Most unfortunate, and they are probably the only ones available on the DLS. I'm unsure if you would find anything on a 3rd party website either, and if you did, it would probably be European which may give you exactly the same results. Only thing is to do the catenary separately on your route, but at least the height would be correct for your locomotives.
I remember the NEC layout from Wilmington to Philadelphia on the DLS was all electrified, if you download it you can see which assets were used by it's creator, and it's the only electrified layout I know of from the States....
Happy hunting.
Cheerz. ex-railwayman.