I'd get this as it comes with the world famous Canadian style buttons we all know and love.
http://www.kitbag.com.au/prod932.htm
There is a lot out there when you search, but not much cheap. There's an Italian guy in the Aussie sub forum who has tons, you could PM him for info.
A trip down under might wind up being the best idea, or lurking on the buy and sell here for a used set.
As an edit I'd like to add another set of pants, a jacket, and a camelbak carrier to mine along with a set of the desert Auscam just in case someone chimes in with "well I have something I don't use".