we bought ours from a shop at Port Augusta in the early to mid 90's, you still had them then. I didn't finish high school until 1988, then it was a few years after that I became a Carpenter and a few more years after that before visiting South Australia on an Endevour Car Rally with those work mates, which is when we bought them.
Time gets away from you, I'd been working for 12 years by 1988, I don't remember them too much in the eighties.