We have used both AMD and Goodmark 70 and 71 fenders. The Goodmarks had fit issues at the top front door gaps as were the AMDs did not. At least the ones we had.
I've also used several repro grills, again both 70 and 71. On the 71 use your original 6 "C" moldings as they will fit better than the repros.
Jeff at 521 Restorations usually has a good price on 71 grills and AMD stuff.