We had a water leak that damaged a 8 foot trim piece. I took a good piece of trim and had Lowe's color match it and bought a quart of paint. I made a replacement trim from wood and painted it. You can't tell the new from the old and there mounted side by side. You might want to try this. Your pictures don't show a lot of damage so you might be able to just touch up the damaged spots without having to replace any panels. Good luck on what ever you do.
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