How Australia could build naval capacity in six months

How could Australia create sustainable naval infrastructure between January and June 1940?

Buy machine tools and equipment from the United States, establish domestic production, and prioritize submarines and torpedo boats.

The planning problem allows six months to create the industrial base needed for useful vessels to begin launching about a year later. American tooling and equipment provide the proposed starting point, followed by domestic construction of submarines and torpedo boats. Forward-deployed torpedo-boat flotillas around Singapore and Australian harbors could handle local presence and defensive duties. That would free scarce cruisers for operations that required their range and heavier armament.