You can purchase the hood components from Chevs of the 40's ,
www.chevsofthe40s.com ,see part numbers 3686040 and 3686039 for the Hinges. You probably need the hood hinge bolts too.....
You can buy the spring / post from Classic Chevy ,
www.classicparts.com , part numbers 38-602 and 38 -651 .
Good luck on your rebuild.