70 duster front fenders

hello everyone, i took the front fenders off of my 70 duster and found out that there are rust holes in the "long tab" of the fender. that part on the inside of the engine bay where the bolts connect the fender to the engine bay. is there a way to fix these rust holes? do i have to find replacement fenders? if so does anyone know where to find replacement front fenders brand new? thanks for your help. :headbang: