If you watch ebay and camaros.net you will see them pop up from time to time. There is a guy on camaros.net selling a bunch of NOS sheet metal for a 69 there now. You just have to be patient and keep watching. You could also place a wanted ad on camaros.net but that will probably bump the price even higher.
i have a customer who needs 68 front fenders and extensions and his "buddy" told him not to buy anything but GM Fenders.
so i told him i woudl see what i could find,
i am doing my customer service thing
If you think GM fenders are going to fit any better than repros you could be in for a big surprise and will be taking a sledge hammer to them too! It all depends when they were produced and later ones fit just as bad as anything you can find, quality control was not any better at the GM stamping plants on cars they weren't building anymore.
I remember a time when 2nd gen Firebird front fenders were so bad that people would ask for reproductions.
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May the Horsepower Be With You !!!!