Drivers seat, early style runners

That doesn't look right.

I may even have a full back -will have a look for you. Otherwise I have had a seat like that before which I binned although I may still have the 'top' albeit in one piece.

The good news is the top does nothing but keep the seat's shape, i.e. there is not connection from the broken part you have to the top of the front section in the middle (see base of seat for what I mean as that is in contact)

I thought you were after the base springs as they are the ones that usually break or get deformed. Might be worth checking the base -look at the 4 coil springs each side and the 4 central springs at the front where they return on themselves