Rubber moldings are often sold in rolls of 50-100 feet for $100. Where is a good place to buy an 8 foot section for a slide out? I am interested in the piece across the top on a Rockwood Ultra lite. It is D shaped.
McMaster-Carr also carries shorter sections, and sometimes you can find them on Amazon depending on mfr and profile. Trim-Lok is the largest supplier if you are looking to match the profile.