http://rvsnappad.com/collections/snappad/products/new-snappad-xtra?variant=23711565827&gclid=CJOSiPqytdACFUtufgod_UwLVg anyone bought these and used them yet look pretty neat and effective
I've been thinking again. A single full sheet of 3/4" ply yields 6 three layer pads. My last set lasted years. They were untreated. I believe I'll go again with plywood, but this time starting with fresh dry wood, I'll polyurethane them, possibly before or during assembly.
Nothing against Snap Pads, but these I can also use to block up my tires so that nothing is hanging free.