Have you tried Year One? They "had" the best most accurate reproduction A12 hoods, haven't looked lately to see if they still offer them but that IMO is the best option for a reprodution and as Mike said an original is the other.

Here's how to tell the differences:

http://a12mopar.com/yabb/YaBB.pl?num=1198305056


MikeR

BTW that original hood in the link is my hood and I wetted it with water to show the crappy job that was the "norm" on the original hoods and how it is "green" from the resin.