Is there a limit to the extent of a stopway?
Probably something hidden away in the bowels of the airport design standards. I'll run the question by OverRun who knows about such things.
I'd appreciate your naming the one airport you found
Probably a NSW/QLD country aerodrome as I recall -it was for a third level operator - 30 seat style of aircraft - long time ago now so the recall is a tad faded. I have a picture in my mind of the relevant runway terminating at a cross runway.