I would bet that most of the "aftermarket" body panels are made with the same stamps, and re-branded by some of the different companies. Same thing happens with most tools you buy.
I hope to get started in the next month or two. My little brother has his 68 Chevelle in our shop now. When he's done, the firebird moves in if I have anything to say about it!!! I will definitely report back to this forum about my progress and the quality of the AMD parts.