The vessel at the link below doesn't look that different from the Armidale class:
Austal Rolls Out First Cape Class Patrol Boat for Royal Australian Navy
(Source: Austal; issued Dec 08, 2016)
Australian Defence Industry Minister, The Hon. Christopher Pyne MP, Senator Chris Back and Federal Member for Canning, Andrew Hastie MP joined Austal Chief Executive Officer David Singleton and Austal Chairman, John Rothwell at the official roll out, completed at Austal’s Henderson Western Australia shipyard.