Sharky, I gave a try to finding what you're looking for.
I searched here :
I did not find any cable that fitted your needs. You could try to search for cables with more contacts. You could cut each end of the cable to make it fit in a 55 contact connector.
I never tried but maybe that two or three ffc cables can fit beside one another inside one connector. It would be a pain to connect but you could probably find a combination of connectors that fit what you need.
Why do you need that? Did you disassemble something and you broke one of the internal cables?