Most lift off hoods and deck lids are race weight. As such I don't think any feasible about of added material would be enough to support the hinged weight. Why not buy a bolt on hood?
I recently thot about this same thing, I use a lift off hood because of an ex broken neck. I don't have the stock hood hinges, or hinge pins for that matter. I saw aftermarket billet hinges that look like they could be adapted to diff. cars, but were in the 6-$700 price range !
Lift of hoods are a pain in the a$4 when in the garage and off !
