still operating in Australia:
Not at present anyway
Taily. A check of the Aircraft register shows no aircraft with that registration, but it is also not in the list of available marks.
Also, a check of the c/n comes up as no aircraft listed.
And the Opal Air that operated C421s from YPAD ceased operations over 20 years ago from memory.
There is a company called Opal Air operating out of Coober Pedy but that company has no connection with the earlier operation
AFAIK.