Hello, Mr. Bachmann!
I really appreciate the P&LE S4 among your new N scale models, but as several others have pointed out, the paint scheme is a fantasy dreamed up by the artist Howard Fogg. I think it would be great to have a "Howard Fogg" version of the model, as a way of honoring him, but there may be copyright restrictions on its use. I really don't know.
But I hope you go on to make the S4 in a scheme the P&LE actually used. (The Atlas HO Alco model has it right.) I do commend you on the color of the Pacemaker Green. It appears to be right on.
For what it's worth all P&LE S4's were sold in 1966. Here is what they looked like in 1964:
(https://lh3.googleusercontent.com/-5ZuhibVvbbs/UDKvylVaQcI/AAAAAAAAIvY/x5taOklVATU/s800/ples4%2520001.jpg)
And here is the Howard Fogg post card of something that was never made in the "real" world:
(http://i114.photobucket.com/albums/n255/Chris333_33/PLEfoob001.jpg)
I have no hope of Bachmann changing what is probably already "done", but I would buy one in the correct paint.
Chris
I believe that Bachmann is leaving that up to the Modeler to get the correct /specific model.
mots