If you want to save some money on the blue vinyl insert try JD Saunders and talk to David Saunders. Tell him I sent you. He is a really nice guy. The #1-800-541-6439. It is officially called the beltline at the middle of your trailer and the rubrail toward the bottom. The rubrail is wider than the beltline. The insert basically just pops in (I did it with my fingernails, my husband used a screwdriver) and then you rivet at the ends to hold it in place. There is a picture of me on about page 5 of the Rocky Mt. Rally postings putting in our insert. Good luck.
Leigh (IB Aluminated)
"When a great ship is in harbour and moored, it is safe, there can be no doubt. But that is not what great ships are built for." by Clarissa Pinkola-Estes, author of ‘Women Who Run With the Wolves’