Go to your local hardware/lumber store, buy an 48' X 8' piece of chip board or plywood, and a bag of self tapping sheet metal screws. Oh, don't forget to buy an 18V cordless drill with the screw adapter. I believe it is 1/4 bit??? Then lay the wood on your bed and screw it down. You could get real fancy and buy some hinges, cut the ply wood in half and locate the hinges on the two pieces of wood. Then it opens too for easy access!!! Good luck my friend!