Looks like you will need to the top center curved panel (not the roof panel) as well, making it three panels, if you don't replace the lower panel above the banana wrap.
Replacing the top center panel will allow you to align the other panels properly.
My guess for a professional repair bill from a dealer would be around $8000-10000.
If you do it yourself, 1500
for three panels and 300 for rivets, clecos, vulkem, drill bits, masking tape, rags and paint thinner, plus shipping.
3 long weekends and a very patient buddy to give you a hand.