Can't help on brisbane profile but you have 3 options.
1. Email water company, get relevant profile averages and guesstimate. This is ok if your water is not treated with chloramines and is soft and slightly acidic or pH neutral. Most melbourne water is like that. Haven't brewed in my new state but I don't think there will be too much difference.
2. Get your water tested each time. Effective but impractical unless you are a lab or annual brewer.
3. Get an RO unit and make your water a blank slate. Add salts to build preferred profile. Cons are the initial outlay for the unit and some wasted water but pros are the simplicity of knowing and trusting your base water.
In any case you will then need to add minerals (unless 1 means you have mineral and chlorine rich water, in which case 3 is a worthwhile investment).
You can find purported historical water profiles in beersmith, how to brew and elsewhere and they will tell you what salts to add to achieve that if you provide the base you start from.
Personally I see that as a bad approach - water profiles change, historical reporting is not always accurate, given profiles presume historical ignorance (no tinkering with base water) and even if accurate, presume that is the best rather than available water.
Get base water right according to grist and desired water, add minerals and/or acid to achieve that.