I think LISA Pathfinder showed that it's possible to phase lock lasers over very long distances as long as they are in a stable orbit. It's basically a metal cube in freefall surrounded a proximity sensor, so that as the sensor drifts toward the cube, but long before making direct contact, the apparatus can adjust it's position. The experiment demonstrated that the system can be used to keep mirrors precisely separated over large distances in support of gravitational wave detection. I would think something like this could be adapted to align lots of things that are in a stable orbit.