I second hobby link Japan (www.hlj.com). But as pointed out by P Mitch, takes as long as it takes. If you buy items that are in stock, this will be much faster. About two weeks to Australia, depends where you live though. If you buy backordered or out of stock items, I'd suggest 8 weeks is not unusual.
However, I dont know what they're line of tools are like.
I've also used www.luckymodel.com - probably a bit longer than hlj, for shipping, but cheaper and with a much bigger range of model kits and a/m parts. I've only bought things in stock from them, but I hear their lag times on out of stock items can be substantial.
Hope this helps.