IIRC, OZ market version of the CR-814 is CR-824.
The US market version will have 10 kHz steps on AM (not 9 kHz), and the FM steps are equally wrong.
Craig Rasmussen (from the SA Volvo club) fixed me up with a CR-824 after the factory TD-6146 in my 780 didn't like tuning into Australian radio stations, and there wasn't any way to adapt the OE unit to do it. The faceplates look very similar on each unit, but the guts are completely different.