Well I have decided to remove the interior completely. As I was removing the back bed, I found a ton of water under the rubber floor mat. I am thinking this was partially from Ryder hosing out the interior when they where cleaning it up and a small leak in the rear panel. No rust on the floor at all, but boy did that water stink. I also found areas of the existing panels behind the bed which where 10 shades brighter grey than the yellowing areas of the rest of tha cab. I have been putting some serious search time looking for interior material, but I am just not finding what I want.