Biggles, I'm assuming you have the same Patrol as I have. The GU 4.2 Diesels only came out for 2 years (1998-1999). thereafter they changes to the 3.0 engine. The 4.2 diesels also only came out here in SA as the GL model, which had absolutely zero luxuries....
... There was never a roof console fitted or sub tank or sunroof or climate control or leather seats. However the leather seats was an optional extra.
The roof console can be retrofitted. Christo who is quite an electrical boffin in my opinion did a roof console installation in his Patrol ( exactly same as mine) and with a detailed wiring diagram to get everything working. However its not a simple quick job, and a lot of cutting and behind the dashboard and instrument cluster work needs to be done. But having said that, I managed to do it, and I'm no electrical fundi.
The buttons to the left of the radio.... If you still have the original electric aerial, then the top left button adjusts the aerial to either be fully extended, or can be set at a halfway mark. Chances are that yours has already been replaced with something else, and you will never need that button again. My suggestion... just fit a blank plug in the space.