On your Aussie Zone instance, go to "search", and past the url in there. You might have to try this a couple of times, but it will show up eventually. Then you can subscribe to it from your instance.
I'm finding that if I click on a community and there's no "Subscribe" button, there's a text box under it that usually ends with a string of text that begins "!".
Copy that and then in my instance's "Search" field paste it in and search for it. So far that results in a link that I can subscribe to. It's a bit more work than that other place, but it does work.