I would start with the reseller where you purchased the kettle from. Maybe that seller will ship you a replacement bowl. The warranty from Weber is normally limited to countries/regions where it is sold. E.g. in North America it is limited to US, Canada and Mexico. In Europe is is limited to kettles sold over there. I would guess the same for Australia. You can contact Weber Australia, but my guess is that Weber Australia will not honor the warranty for a product purchased in Germany. They may not even have the option if the product is not officially sold in Australia.