How to? Fix a sagging fiberglass hood... Heat Resistant Foam?

famous bob said
??? Unless its really flimsy , it might stay the right shape with simple blocking and spaceing , upside down on a couple of sawhorses .??

Go online and look for fiberglass supplies.

Quality glass will use a honeycomb material instead of cardboard and you can buy it in various thicknesses and widths. Or you can cut to whatever size or shape you need.