NASA would have to pull out the Saturn V blueprints and rebuild the manufacturing process from scratch. They would have to start hiring from 0 and reacquire all

NASA would have to pull out the Saturn V blueprints and rebuild the manufacturing process from scratch. They would have to start hiring from 0 and reacquire all the institutional knowledge they lost over the past 50 years. They would have a real problem with supply chains: those are all gone, the tooling scrapped, the workers retired, and the business sectors offshored. They would have to redo all the testing so the process could reliably produce a working rocket from the designs. And the designs themselves are based on obsolete techniques, materials, and components. Even if it was possible, there would be no point: the blueprints weren't the hard part, and the world has changed since they were drawn up.