The Commemorative (stupid, PC name change from Confederate) Air Force Museum in Midland Texas has an amazing collection of original nose art...
They came from the manager of a scrap yard after WWII...he liked the nose art, so he would have his guys cut the panels out using chainsaws before the planes were scrapped, and he stacked them in his barn...eventually the CAF got them all, and painstakingly conserved and preserved them, and hung them in a special climate controlled area of the museum...
Amazing bunch of nose art, as it was....they have a nice book with all of them in full color, and descriptions and stories....