I made a super-quick DIY set for my new Downtube folder, out of overlapping strips of matte black duct tape. I cut two pieces of tape about 11" long and put them next to each other to make a 4" wide strip. Then folded the bottom to within 3/4" of the top to make a nice sturdy piece with some sticky left over to attach to the actual fender, used a utility knife to make the smart-looking tapered shape. worked 95% well in an 8 mile r/t ride thru very wet streets yesterday.