I have 1/48 scale plans from the Reading Historical Society (Ed Wiswesser) that I reduced to 1/64 scale, from that I can make a mold in balsa, then lay the plastic over it, using wire around it to secure it to the mold, then heat with a heat gun. I agree that the end pieces would be difficult, but if everything else works, I can cut the part and use plastic to get the correct shape.
I already contacted LBR. I may have to send them copies of my HO scale decals to be enlarged to S scale. The Red lines are not correct for Reading, yellow/gold yes.