Electronics
This database assigns those Australian companies and professionals to the electronics category which engage in commercial or other activities relating to the electronics industry. If you think the electronics category best defines what you are looking for, then you can either browse its records one by one Australia-wide, or focus the results on a particular locality.
You may wish to refer to categories other than but related to electronics, as it may not be a precise description of the type of enterprises you had in mind. Whether it's the electronics industry you're after or another area altogether, finding the products or services for your situation has never been easier.