I've repaired many of these with the same problem, and here's what I did. Lay the board on a flat table, heat it with steam. Steam seams to actually get the materail wet enough to where you can work with it. Once it's very hot, place a bunch of wieght where the warps are. I simply used a big pile of heavy books and placed them all around, then let it sit overnight. Once it was dry, it held it's shape, and once it's in the car, the overhead console is gonna help hold it in place also. If it's really bad, you night have to use some industrial strenght sticky back velcrow. Earlier poster is correct, as of yet, nobody is repopping em, at least that I'm aware of. Good luck.