Thanks all....
.....trinity, I called Intelliquip yesterday, but they bought the name and IP only. They did give me the name of a repairer in Melbourne that has done a few.
.....John, nice idea, but if needed I'd prefer to repair to original specs.
.....kizza,
In any event, it seems to be working OK again. Hope it holds up for our return visit to the Kimberley next month.
Think I'll be fitting the timer switch into the Patrol, just in case....