Solar Power Energy Meter (Malvern Link WR14)

My solar generation meter display has stopped working. It's in two parts (see pictures) - one is the display and the other sits next to the generation meter and has a sensor that is stuck on to the generation meter. I don't know which of the two parts is faulty (and they no longer make them). Has anyone got either or both parts lying around that they no longer use; they don't even need to be a working pair?