Chosen Solution

While trying to replace the WiFi antenna flex cable on my iPhone 6, I discovered that one of the coaxial connectors that attaches the WiFi flex cable to the logic board had come off of the logic board. Unfortunately I lost the connector while removing it from the flex cable. Does anyone know the name of this particular connector and where I can buy it? It is in the red circle in the attached image.

Any help would be much appreciated.

These are really hard to source. It seems like every model has slightly different size connectors. The best solution is to harvest one from a donor board.