Just booked one of these; with a stopover in Oman on the way back.
Dates are wide open right through until March next year. I've just posted an example on Google Flights.
Can book directly with omanair.com - or use an OTA for a little extra $.
Note that this STARTS and ENDS in Egypt. It is NOT available starting in Melbourne.
Sydney is apparently also available for the same price, but I haven't checked availability.