STEEP TURN
I know of one Piper that had the hail dents legally repaired by filling and repainting. I also know of Piper making new parts for 40 year old Pipers.
Things are not as grim as you indicate.
Perhaps there are different interpretations of the rules in various administrations. It's my understanding that, in some jurisdictions at least, repairs can be made under Part 43 or equivalent that allow fabrication of parts using the originals as patterns.
I also find it hard to believe there were no second hand wings or spars that could not have been used to repair those Arrows.
However as the OP seems to be focusing on a new or near new aircraft this discussion on old aircraft is a moot point.