I returned a bunch of stuff by Goodmark and determined I would never buy another repro exterior body panel without seeing it first hand. Unfortunately that means buying only at shows because no one is nearby.
As far as I can tell, this hood sold by D&R is not Goodmark's. I asked D&R at the time but forget the name. They did not say it was Goodmark though. That doesn't mean it didn't originate from the same shop in Taiwan. One stamper could ship under a few lables. It's not marked on the carton. Names that come to mind are DII, Golden Legion and Goodmark. Maybe they are the same original manufacturer. Anyway, these parts need to be examined before buying if at all possible.
It would be surprising for there to be numerous folks tooled up to make this part. I saw hoods that appeared to be from three different vendors at Carlisle and they did look different. The largest difference was in the primer coat and the forming of the point of the hood. It could be quality variations, different lots or mishandling. Other body panels such as quarters and door skins had obviously poor body lines where the panel wanders adjacent to the intended crease.
D&R was nice to deal with at the show and I recommend them. Both 400 hoods they had on display were in excellent condition and were the best available at fall Carlisle.
Tom is right about the repro bumpers. I saw many of the rear bumpers at the show. They had tooling marks showing through the thin chrome. They look bad from a distance. For bumpers, get the original restored by Tri-City or equivalent.