I am looking for a 5th wheel hitch pin box cover to use while the RV is in storage and to keep the birds from building nests. I know there is a company called Hitch Vest but it is bulky for travel. Does anyone know of a canvas or neoprene cover that might have a draw string or zipper to cinch it closed? I have the Reese Airborne Sidewinder pin box (#61412), which is larger than the standard pin box, so, not even sure the Hitch Vest work fit anyway. A trash bag works for now but looks really bad.