This is the one that came to mind immediatly. Dixie Alexander's Spit Vb Trop of the 52nd FG in the Med.
It has the large Vokes filter with the shark mouth on it. It would be the Dark Earth, Desert Tan, Azure blue camo with a red nose and 52nd FG markings which would be VF, WD or QP with the individual letter. Not sure which ones were on this bird however.
Ugly isn't it
All the Aussie shark mouths were from the same 457 RAAF "Grey Nurse" Squadron.
Dan/Slack
