stash77 forwarded the pics to me, and said he had no problem with me posting them, so here is what he is talking about. It is for the side of the door.
In addition to Bill's suggestion above, "Door Bottom Sweeps" are also at
McMaster. Enter 2841 in the search box to see their options. I like the brush bottom seal the best, as the door has to sweep over a fair amount of floor when folding the TM. They are roughly $10 + shipping.
Dave