Stephen B said:
As Credy says he uses a lot of 240. So does Alex and I and a whole lot more of DIY and small production artisans and craft persons.
Actually, I hardly use 240 grit. I just said I appreciate the 10 packs very much, and I fully support the idea that all grits and types should be available like that. But since I mostly sand painted wood, my needs stop at 180. Sometimes when the job calls for it I use finer paper like 320 or 400, but very rarely 240. I have a dealer close by who sells Brilliant by the sheet, so I got some 220 just in case it might come handy, but it's mostly untouched yet.
How widespread is the dealer network in Australia? If you look around you might find some dealers who are willing to sell you paper by the sheet or their own made 10 packs. I'm lucky where I live, there are so many dealers around, not all of them are willing to sell beyond standard box quantities (most aren't), but a few are, and that's sufficient for me to get what I need in the quantaties I need.
You just need to find them. Look around and when you see a tool store you don't know yet, have a look at their inventory, you never know what you'll find. Or through the internet of course. Do you have an Australian eBay or CL equivalent? Lots of stuff to find there. Private people cleaning up their shelfs can be a great source. I found 100 various sheets for the DX93 and 50 sheets of Titan for the RO150 last week for only 20 euro.