^Thanks chaps
I can now confirm 100% that they are the same. This afternoon I pulled a set of mint doorcards in
exactly the right colour without even the smallest hint of wrinkling/peeling from a 940 sedan breaking locally for £20 all in. Can't believe my luck
TLDR: For anyone else who stumbles across this thread in future, saloon rear doors and cards are the same size as those found on estate models.