I haven’t ordered fenders reproduction, but many of the patch panel/parts I have ordered reproduction are “close” but not GM quality. More than once I’ve been angered by the garbage I’ve gotten. But sometimes things do fit.
My list: rubber seals: decent but not super snug. Steele windshield rubber was very good though. Hood bumperettes fall out consistently. Had to glue down.
Rear tail lights. Cheap chrome, mounting bolts did not line up with originals. Had to modify.
Bumpers fit, but look like $180 bucks. Unfinished edges, burrs, etc.
Door handles- had to modify to make them actually engage the lock mechanism.
I don’t think I’d splurge on something that I’d be unhappy with. Originals might need a little work, but will look better, fit better.
C10 fender patches lacked the bead roll of original. Had to cut apart and splice in the bead roll from original.
If I were you, as Tom suggested, I’d keep looking for originals on such a big ticket, visible item. My 2 cents, but I’d also like to hear other’s reports on aftermarket fender quality. I believe I read somewhere the AD truck reproduction fenders have a seam running across the fender. Do more research, I say. Christmas is still 2 months away. 😃