Canberra
In the Sydney forum, TONY-T praises Wee Away (made by Rufus & Coco) for completely removing the stains and smell of vomit: https://uberpeople.net/threads/had-my-first-vomiter.204872/. (Many thanks to Tony for this practical and helpful advice.)
In Canberra, you can buy Wee Away at Woolworths...