I suspect you're not gonna get complete plastic free off the shelf down here - even a stovetop kettle has a plastic whistle and handle. If you want to support Australian companies, the breville glass / stainless steel ones have minimal plastic (mostly in the hinges, handle and some base moulding).

Otherwise there's the Saki Luna (entirely stainless steel), Bella do ceramics IIRC and last I saw Ascot were doing some exciting things with glass and steel....