I suggest contacting the Australian Electoral Commission about this. You may also be interested to note that the National Library of Australia has an extensive collection of electoral rolls:…"
Good morning,As you may be aware, National Archives research centres are closed to the public until further notice. You can still explore the collection (https://www.naa.gov.au/explore-collection) and view digitised items online. Please check our website and social media for updates.If you require a record for proof of arrival, citizenship or other urgent matters, please submit an inquiry though the 'Ask us about the collection' (…See More
Due to the large number of not yet examined items in our holdings, records are generally only examined for public release when a member of the public submits an application. In the case of WWII Army and RAAF service records, we examine…"