Hi mk,
I just repaired, repainted and reinstalled both front banana wraps on our ‘73 Argosy.
You may already know this; but the way to mold them back into shape is to lay a bag of playsand on the ground, put the banana wrap dent on the playsand, and use a Boce Ball and slowly push and roll the dents out. The more patient you are and the more time spent, the better they will look. The aluminum used is quite malleable. Ours were pretty smashed up- but I am very pleased with how they turned out, with only minor waves still showing but the original shape fully restored