Hi all. As you may know, we are refurbing a 72 basic 4L. The seats are the deckchair type with tubular frames. Under the fabric there is an arrangement of cardboard and rubber panels which are stitched together and gives the "give`' in the seat. This is then covered in a kind of velour or ribbed velvet covering all held in to the frame with wire clips. Coverings appear to be OK. Does anyone know where to get the cardboard and rubber under panels from. In ours, the rubber has perished, and pulls apart along the stiching when it is sat upon. Any help or suggestions or ideas for alternatives are gratefully received. I would need a complete set, 4. Thanks Edwin