The Jakarta Post has reported that Indonesia's third (Improved) Chang Bogo (Type 209) Class submarine (lets call it "Submarine 3") will not be built in South Korea but at PT PAL’s shipyard at Surabaya, East Java, Indonesia. In the Jakarta Post article comments by Indonesia Defense Minister Purnomo Yusgiantoro then carry the possibility that Indonesia's other nine (Submarines 4 to 12) might also be Indonesian built. Please connect with Submarine Matters' Indonesia Revisits Buying Kilos and Indonesia Decides to By Korean Made. and most recently:
South Korean Submarines, 3,000+ ton KSS-III, Nuclear Potential of April 16, 2014 which comments on Chang Bogo's South Korea has built for its own Navy and for Indonesia.
The Jakarta Post article, February 18, 2014 http://www.thejakartapost.com/news/2014/02/18/pt-pal-gets-more-funds-build-submarine.html reads: