I am heading to Japan in December, if its much cheaper in Aus (considering the Yens strength) happy to buy it here for you and sell it to you at cost when I hit Kyoto (I think we are there around the 15th of December). Check Mainpeak - Australia's Online Adventure Store
and let me know if it helps you any.
I use Icebreaker stuff and its been great for me. Sometimes I found it too hot wearing the pants and stopped using them but the shirt was good, used in generally in Tokyo a couple of times on those cold wet days and it worked well even after getting wet.