They didn't come standard with eirther a radio or side mirror. Both were only accessories, bought from and fitted by VW dealers at the time. They were locally made brands, back in the days when Australia used to make electronic equipment. Do an Ebay search on 'Vintage Car Radio' and see what you find.
Scroll down here to see a typical AWA radio ad for VWs from the times:
http://www.clubvw.org.au/history002
The proper VW mirrors of the time were fitted onto the top door hinge pin. You can buy the mirror and pin from any decent VW parts shop. Best to have them fit the pin for you too as it is a tricky job to remove and replace without damaging the paintwork.