Location of Other Basestations Displayed

I’m using RFD900+ radios with 2.x firmware to control a copter from multiple base stations. The copter is Node 0 and transmits to all the other stations. Each station only transmits to the copter. The main pilot has Mission Planner and the others are using Tower.

I would like to see the location of the other basestations on the map display in each software. Is this possible now? I’m wondering if each station transmits its location to the copter over telemetry and the copter then transmit all known stations back out? Then the software would have to understand it and display it. How much would this cost to implement? Would the RFD firmware need changes as well?