Because of the raised areas on each side of the bed it is hard to find something that will fit and not have a lot of unused space. I have seen plywood platforms and metal frames on the forum that span across the area to make a large flat surface. The problem is when you need to get to the motor hatch you have to unbolt the plywood or metal frame and re-install it when servicing of the motor is complete. I came up with a 16 gauge aluminum platform with a piano hinge, anchored on one side using the lock and ride system. because I wanted something light yet strong enough to hold a large plastic storage box and cooler I drilled holes in the plate and used the dimple dies to make the aluminum stronger. I bent an angle on the back to keep things from sliding around and it still allows access to the two back lock and ride anchor points to tie down what ever is in the cargo area. I attached a photo of it both closed and opened. Later, Trashpicker.