Come now, it's not that bad.
I believe you are thinking of someone else in regards to the pictures. The local yard had a GTS that I was going to get the pieces from. When I went back to get them a few weeks later they had crushed the car.
I'm mainly interested in the rear wheel well lips. The rust is only what you see bubbled in the pictures. There is very little rust behind that or underneath the car. The front wheel well I believe I can get from a Daytona in the local yard. The shape appears to be really close. Worst case I can make something up for that area.
As far as buying your shell, while I would love to do that. I believe the cost to buy and ship it would offset any gains.