On Sun, 29 Sep 2013 16:36:27 -0400, BobMCT
wrote:

But, regarding replacing the sensor, can anyone advise as to what
other sensor(s) will work with this unit (Phantom 777)? The current
ones are "discontinued".

Seek out "universal" sensors, try local stores?

I had a bad sensor on one GD. I had both replaced when a new GD was
installed. IIRC, it did not matter on the GD brand. YMMV.