This query is aimed at the sparky members: I am trying to track down a particular type of light switch which may or may not be available nowadays. I have tried Googling to no avail. I don't have a brand name and I find searching Australian supplier's online catalogues slow and tedious.

Here's a photo taken by 'el cheapo' phone camera:

Clipsal flush plate, Cat. No. 31VR.

They fit onto any of Clipsal's conduit junction boxes and also junction boxes from other brands like Aussieduct.

And, yes: online catalogues could be better designed. A lot of webmasters tend to put form over function these days and a website that looks pretty is often preferred over one that just does the job.

Many thanks, Brad!

I forgot to mention - as it is in their current catalogue I would assume it is still available. It's a common sight in carparks and plantrooms.

What is diagonal screw spacing?

What is diagonal screw spacing?

I guess it means that the screws are oriented diagonally at (approx) 2 o'clock and 8 o'clock -- as pictured.

The screw holes are at an angle because these junction boxes are available in 1, 2, 3 and 4 way types. There is also a type with one entry on one side and two on the opposite side. These products can be mounted on a surface or buried in concrete slabs.

They are available, called 31VR Flush Plate, For Junction Box, by Clipsal. I think these take a standard mech but are not weatherproof. Available in white and grey. 50mm screw centres.
I have not used these for years and even forgot they were available.
You can also get a WSR226, which I think fits a conduit J Box, these are IP54.
Clipsal