How to repair a body?

[lincpimp]

Just wondering if anyone had a good idea to repair a lexan body. Specifically it is a truck body, and damaged where the body posts go throught in the bed area. I think that something glued to the bottom would be good, but I figured that I would ask as I have not fixed one like this before.

Maybe some silicone and a flat piece of thin plastic on the underside? The area is ribbed, so it would not be easy to get a piece of anything to fit flush on the underside. The rest of the body is useable, and I really do not want to spend 40 bucks on another body just to bash with!