PE I first heard about it in the eighties when a colleague returned from an American work trip to Rochester, he had a copy.
I wrote to Preston publications and sent a bank draft as I didn't have a credit card. I received my first copy about two weeks later, I was flabbergasted with their speed of reply.
Yes it was available in Australia, but as far as I know only by subscription in the mid eighties. By the nineties, it was in selected big city newsagents, still is I believe.
Mick.