Ford called the part your looking for a "Finish End Panel" for the instrument panel. Part number is D1ZZ-6504393-A. It was a seldom needed or replaced part so by 1979 it was discontinued. It was used from 71-73 on all body style Mustangs, so if you can find any 71-73 parts cars in your area you could source one from them. To my knowledge is not a reproduced part. You could check with Don @ Ohio Mustang Supply or Mike @ Motor City Mustang as they both have parts cars and may be able to help you. If not, maybe someone here might have one in a parts stash. Good Luck with your search.
