1972 Dart Swinger Front Fenders

Hello my Name is Steve and last year I purchased the car I've dreamed of since Jr. High (im 53 now). I thought everything I needed for this car would be available thru the aftermarket. Well last week at the Mopar nationals I learned steel front fender reproductions are not available for the 1972 dart swinger. I'm confused because the 1971 fenders look identical. does anyone know the difference? Can I weld a piece off my 72 fender on a 71 to make it work? Any help would be appreciated. Thanks