I doubt that this is an original thought, but...
I just replaced the wireless anny transmitter with a hard-wired cable and I got to thinking. Some people have wanted the ability to separate everything on an ISS; the rain gauge, solar/uv, temp/hum...
It seems to me that one could use the anny transmitter, the sensors from a temp/hum station, an aftermarket rain gauge, solar and UV sensors, and either a wired or wireless anemometer to make a replacement for the all-in-one unit.
Tell the console that the replacement ISS transmitter is an ISS, and it should work.
Granted, it would all have to be wired to the transmitter, but I think it would work.