REalloys (NASDAQ: ALOY) is assembling the only non-Chinese supply chain for a component powering nearly everything the modern economy runs on — but one that almost nobody outside the industry pays attention to. A single F-35 carries roughly 435 kilograms of these materials. MRI machines need them to power today's medical imaging. They’re in the guidance systems on missiles, the haptic feedback in your phone, the motors inside surgical robots, and the cooling systems that keep data centers running. Today, the rare earth magnet market…