Custom Mustangs in Melbourne had new dynacorn cowl panels but I see that they have listed them as "out of stock" though. Maybe you could talk to them to see if any more are on the way?
https://www.custommustangs.com.au/1971-1973-mustang-front-cross-member
https://www.custommustangs.com.au/1971-1973-mustang-front-cross-member