When I had a tire blow a unit ago I went to a metal supply store and bought a piece of scrap that was powder coated the same white.
I found that a two liter soda liter soda bottle filled with water gave me the guide I needed to match the factory roll.
Find someone who builds race cars all them guys have sheets of aluminum.
Your only four or five hours from Elkhart, IN. Looks like a little camping trip could be in your future.
Changing the j-wrap is easy if you can handle a tin snip, a screw driver/drill driver and a caulk gun.
Peace
Dave
Now that is an interesting idea. I have the tools and skill set. After all I did stay at Holiday Inn Express...... I could probably buy a piece of panel from Heartland parts, pick it up myself and change it out at Elkhart campground. Hmmmm........
Thanks