I came across this unit when I was searching for a POW taken in the fall of Singapore !
You probably know all this already John ... but just in case !!
Australian Z Force (more correctly called "Z" Special Unit), which was a specially recruited and trained group of saboteurs who operated behind enemy lines. It was a spectacular success overall even though they had some setbacks. It's best known Operation was "Jaywick" during which they entered Singapore Harbour and sank a lot of Japanese shipping under the nose of the enemy.
ZSU - Roll Of Honour Z Special Unit - Wikipedia, the free encyclopedia
Annie