Can you tell me what material the Blackpak is made from? I'd like to buy some of the same material, perhaps a little thicker (or same thickness and sandwich). Want to make a cover/plate for the back end of the storage area on the Ride 115 to use as a mounting plate for the Torqueedo U403 boom mount. Would also just slide the battery underneath. I like the stiffness and weight. Seems lighter and less flexible than if I would use UHMW but not so brittle that it would fracture. Would also be nice if I can get the same color. Either that or I'll see if I can just get some aluminum sheet.