My mid-60s Raleigh Sports features a Brooks mattress saddle - vinyl cover, metal frame with horizontal springs, the whole thing sitting on two more vertical springs.
This type of thing.
Between the horizontal springs and the vinyl cover of the saddle is a thin board material of some sort, which ideally would have given the saddle some stiffness. This board has become soft (I've had this happen on three of these saddles) and the whole saddle is becoming uncomfortable.
Has anyone figured out a way to replace that board, or any other good way to spruce up one of these original Brooks saddles? They're quite comfortable when they work properly.