I would dig out the original fenders. I am not kidding you, replace the patch panels, repair the fender, you will have the same time as the dynacorndog parts but have an ORIGINAL part on the car instead of a Taiwan part.
I have litterally pulled a fender off the back of the steel collectors truck and repaired it and returned a repro one once. NO KIDDING!
I have pulled undamaged repro parts off finished, painted cars and replaced them with repaired originals because the owner was so unhappy with the repro part.
I avoid them at all costs.