Just moved into a new place with about 20 badly yellowed face plates/covers for switches and gpos.
They're about $5 at Bunnings for Deta which I've heard mixed feedback on. Clipsal ones seem to be around $7.50 at directwholesale and HPM (which is maybe better than Deta?) around $5 at sparky direct.
Are there any other sources for cheap electrical supplies like these? Will likely need to replace some downlights in future too.
Check what brand your current faceplates/switches are. If I remember correctly there is a subtle difference in the shape of the hole between the Deta/HPM plates and Clipsal ones.
Sparky did some work recently and used another brand I had not heard of (probably cheaper). Will try and find the name.