I got mine from these guys http://www.maxmcdirect.com/proddetail.asp?prod=DA06BH08&cat=14
and these guys can also source the beet ones http://www.jap4performance.co.uk/ and they are on ebay too http://stores.shop.ebay.com.au/jap4performance__W0QQ_armrsZ1
I am pretty sure both of these places source their parts from japan, so I think it would be worth seeing if you can get in touch with the japanese side of things, or try to find out who their suppliers are. I don't see why they wouldn't tell you, they don't really sell to australia so you wouldn't be too much competition to them, well the jap4performance place didn't seem like they wanted to sell to australia when I contacted them.
and these guys can also source the beet ones http://www.jap4performance.co.uk/ and they are on ebay too http://stores.shop.ebay.com.au/jap4performance__W0QQ_armrsZ1
I am pretty sure both of these places source their parts from japan, so I think it would be worth seeing if you can get in touch with the japanese side of things, or try to find out who their suppliers are. I don't see why they wouldn't tell you, they don't really sell to australia so you wouldn't be too much competition to them, well the jap4performance place didn't seem like they wanted to sell to australia when I contacted them.