We can rebuild the tooling as soon as the people who made the original tools are brought out of their Senior Centers, and are able to explain to younger folks the knowledge of how to make the tools which made the tools to make the parts for the new planes which need to be reverse engineered from existing examples, assuming that there is spare money in the military budget to permit the whole decades long enterprise to turn out a plane that could have been designed from scratch cheaper and quicker.
You can’t go home again.
BS. Give an A-10 to the Chinese, and they'll turn out a perfect copy of that baby in two years.
So could we.