I could be mis-remembering but I think the book that image was taken from has a lightning rail station map. If you don't own the book I think you might be able to find it in the Wizards map archive (called maybe map of the week or something?).

Are you looking specifically for a fantasy "train" station map, or would real-world be okay? Model railroading is another hobby of mine and I have found quite a bit of stuff (blueprints, etc) online with google searches. Should be able to find a wide variety - from "union" stations down to small town depots.

Hope that helps...
M