The newest airframe was delivered 20 years ago. I would imagine it's impossible to start building them from scratch after all these years.
All tooling was transferred from Burbank CA to Marietta GA where Lockheed’s big bomber factory is ready to crank out P-3s. Electras.
To the U.S. Navy. Lockheed production for Korea continued into 1995 after the line was moved to Marietta. Lockheed has since restarted P-3 replacement wing production at that plant.
The last new build P-3, a license built UP-3D, was delivered to the JMSDF by Kawasaki in February of 2000.