If anyone is interested, Rural Road Mapsaps are now publicly available.
http://www.landservices.sa.gov.au/3Government/Local/RuralRoadMaps.asp (http://www.landservices.sa.gov.au/3Government/Local/RuralRoadMaps.asp)
Thanks. That helps me understand which end of the road is the beginning for Rural addressing..
Excellent thanks!