DarthKermit: These PDL 8/16/24 gang plates are a nice idea but the cost of them and their flush boxes are utterly ridiculous. I'd use some if they weren't such a ripoff.
PDL multi gang stainless steel panel
They are absurd.
I have used the clipsal 2000 series with the multigang box in the garage, but the box was a huge cost. Tried to do it with C clips in the loft at the right spacing to get the multiple cover plate to fit and then found that they dont do them anymore. Fffffffff. Plus they look like the deta stuff from bunnings so everyone will assume that's what you bought. Not a fan of the PDL plates - since I dont have their lightswitches or power sockets they dont match and the large modules look a bit silly.