Alan, it's your layout. GG1s could have survived! :-)
Photoshopped by me, however when I get a second Silver G, I'll do this fake scheme for the fun of it.
All kidding aside, all the comments on this thread are really helpful to help get the order page straightened out. I suspect we will be adding an option to do an 8 car set for a more or less complete Lake Shore Limited, Silver Meteor, Silver Star, Palmetto, or Crescent consist.
3rd Rail won't likely be doing a P32 / P40 / P42 as they are nearing the end of their life and MTH as well as WBB have produced these. However, once the replacement for these locomotives has been identified (i.e. Siemens Charger maybe?) who knows what the possibility would be? An ACS64 in O would be way cool, but no discussions there yet.
My photo of the AC64 when new in Harrisburg:
