Hi Mate
The best person in aus to talk to would be ****** at rgv spares ( http://www.****.com/index.php?option=com_virtuemart&page=shop.browse&category_id=43&Itemid=26&vmcchk=1&Itemid=26 )
If your going to use the 300 kit you are best to put a new crank in can get them from tyga not that expensive .