I don’t see a “replacement parts download” drop down (or any drop down). Maybe Abco chose a format that is not compatible with many Apple products (like Flash)? That would be a silly thing for them to do with so many Apple users, but you never know. Maybe I’m missing it, but I’be been on that page looking many times.
This is what I’ve been looking for as well. Also, it should show how to assemble the whole thing from scratch (length to cut the liner, how you get it stretched over the ends with the extra layers, etc.)