Greg,

I recently bought this number from Mouser for another project.
It's a 20-pin FPC pc mount connector. Just tried it with my broken off
bit of flex from the old front panel and the spacing is the same.

571-7-520355-0 TRIOMATE ASSY, TE connectivity FFC and FPC connectors

The contacts look strange in that some stick out more than others.
It looks like the connector is damaged, but I think that was done on purpose so
that different parts will make contact first. Not important here.

Maybe they have ones that have fewer contacts?

Bob