Since I purchased a junk Northern at Allentown last Saturday, I ordered two passenger coaches for the Ramble from American Models. So far, I haven't been able to find S scale decals for Reading (but do have both HO & O scale decals).
I communicated with Bill Lane yesterday, and he informed me that he can't get his molds back from his caster. I asked him to keep me in the loop in case he resumes production or gets his molds back.
Finally, since I am doing major modifications on the Northern, which will take time, I am not a rush to have the good roofs. I may be able to scratch built the roofs by making template out of balsa, then putting a sheet of ABS plastic over it and heating it until it contours to the template. Then I would have to make internal ribbing for support and a way to attach the roof to the car. Then I can detail the roof - if all goes well.