Hi,
I have developed a custom component for aussies who want to monitor fuel prices. I did find an option for NSW but I live in QLD so had to write my own.
Standard way of adding a custom component, unload to your config/custom_components folder, restart and add/configure using the UI. You will be given the option to search a distances around a GPS location, then choose the stations and fuel types you would like to load into HA.