Finally made one for my truck, used a 1/4”panell two hinges and a pair of hyundai tiburon hatch shocks, then throw some polyesther resin o top and made some reinforsement to it with 2x2 and some fiberglass. At the rear end made a small wind deflector and shot jell coat on top of it. It’s been six months and still there with no water damage.I’ll upload some picture later on.