Updated after contacting surgeons:
Quality Life Association has two surgeons listed in Melbourne, Australia.
Mr Philip Smart
Email from surgeon states: Can help patients who already have a continent ostomy, but does not create them at time of enquiring (2023).
Mr Satish Warrier
(Note: His name is spelled incorrectly as “Warriner” on the QLA website. It’s definitely “Warrier”.)
https://www.epworth.org.au/who...or/mr-satish-warrier
Waiting to hear back
(The QLA list includes surgeons who will treat patients who need help with a continent ostomy, but don’t actually create them, so being on the list doesn’t necessarily mean they do the initial surgery.)