....look back in the archives as I have described one in detail that may fit your conversion....It was made by taking 3 layers of materials 1. vinal-a dark wood grained 2. rebonded foam carpet padding[insulation] 3. a vinal covered canvas used in awnings and sewing them together[waterproof barrier] adding a system of snaps and welts/with aluminum channel] around the edges and installing it between the box and cab....made by Heiman Goldfarb here in Cincinnati....geof