Hi Steve,
Not sure about other policies inclusive of road service HOWEVER RAA South Australia (SA's equivalent of NRMA) offer road service coverage comparative to NRMA but they cover the INDIVIDUAL not the car (ie: you are buying coverage for any vehicle that you may be driving on any given day, irrespective of whether it is you car or not) and you only need one membership if you own multiple cars. The coverage is available to any person residing in any State of Australia and prices and levels of cover are comparative to NRMA. I am a member of 3 other car clubs and apparently the take-up by members in the other Clubs has been huge. Google RAA SA & / or call them....... I have also mentioned this a couple of times at AMCCA meetings in the past.
Cheers,
Garth