Can anyone identify this light switch brand?
Your switch and cover plate look very similar to the XLP770 series as shown here:



See here for a distributor web page:

http://www.sparkydirect.com.au/p/935748/switch-1-gang-10amp-250v-white-hpm-xlp7701we.html

See here for manufacturer's Excel Range brochure:

http://www.hpm.com.au/Uploads/HPM%20excel%20range.pdf