67/68/69 cuda dilemma

I noticed the bottom of the decklid is rusted thru. There were some holes drilled in it at the top back edge. I am assuming for a rear deck spoiler at one point in time. Water poured in over the years and ate it from the inside. I may try to fix it, or i maybe on the hunt for a better condition coupe decklid. May concider bolt on fiberglass one if it can be latched with a key and not a hood pin type of thing.