Hi Julie
I have moved your post to a new thread of its own because the one you had tacked it on to is now ancient history, unfortunately.
The answer to your question is that at the moment, nobody knows how long it would take to complete the processing of a new Contributory Parent application.
Please see the following links:
Poms In Oz - Search Results
I'm sorry that it not happier news but hopefully DIAC will say something more definite soon.
Best wishes
Gill