WTB: Inner Fenders for 75 Duster (or simular year)

I've been wrong before but as far as I know, the inner fender deminsions never changed on A bodies from 67 to 76. Only difference being more screw holes in the later applications.
Mine were rusted through at the hump / shock support areas. The facory spot welds didn't close it up tight enough to keep debrie from getting trapped between shock support and sheet metal.
I've cut them out but can't decide how to proceed. Other vehicles have rubber flaps or or seperate filler pieces bolted in there.