I looked as the S24 pages and it's not there.
I also just checked the actual cars to see if I could find any numbers; none.
Most parts can be found in the 2400 section of the postwar service documentation... each car has 1 488-1 Light Coupler Truck with blue painted side frames, the two coaches each have a 487-1 Coupler truck with blue painted side frames, and the observation has a 489-1 Plain Truck with blue painted side frames. The wheels and axles on all of these trucks have instead of the postwar axles & wheels the Fundimensions 9050-54 fast angle wheelsets. The tooling for the lights could not be found in time either, and each car has two 8352-320 2 wire lampsockets with 8352-300 14 volt lamps, wired in parallel(a departure from the postwar lamps that were wired in series). They are mounted on (2) 2400-11 frames and (1) 2401-30 frame(observation).
The bodies were made with the original postwar tooling but were not assigned part numbers, they would likely have been 1973-2, 1974-2, and 1975-2 if following postwar convention. The blue roofs as well would have been (1) 1973-4 roof and (2) 1974-4 roofs... reflecting the first use of the roof on a given model.