I have an old roll top desk that I inherited from my father. Most of my life it had a hard green rubber writing surface inlaid into the top, but about twenty years ago the desk went through a flood and the rubber writing surface was lost during the restoration. It was replaced with a piece of vinyl upholstery. That has since not worn well, and I would like to replace it with a hard rubber writing surface again. Any suggestions where I could find this material? The dimensions I would need are approximately 48 x 30 inches. TIA.