As to the cyclone - this one (Ami) is from just a few days ago.
http://www.stuff.co.nz/stuff/0,2106,2198164a10,00.html
As to the rock, there's none local that I know of - not feasible for the LFS to get the good stuff in?? Go figure - 12 dollars per lb of base rock... Woo!
I was checking on a guy selling his tank - another local dead end.