I think you are missing the point. It's not that the resource will not be available, but that the cost of acquiring and transporting them would be on a different scale. Especially if you lose access to many primary resources from places like Australia, Brazil, Chile, and the like. And then the export costs will also be far higher, once you lose reliable access to the Indonesian straits.
The best counter to that would actually to develop robust capabilities to consistently and persistently target rear area logistic basis of US and close allies, which means you would need to be able to have the likes of H-20, JH-26, robust CSG with large number of ASW assets and emission guided land strike weapons, or a large number of SSGNs with land strike capability, to threaten US forces in those areas, so that USAF and expeditionary USMC forces could no longer reliably protect those rear operating areas. You would be able to have the persistence and magazine depth, to hit locations like Guam, Wake, northern Australia; and if the war extends into years, then also western parts of the Aleutians and Hawaii, maybe even Diego Garcia and other British Indian Ocean territories. . They you can push the sea and air assets from US/Japan/Australia to be unable to persistently operate where they can constantly threaten your sea routes.