Good evening everyone. I need some help.

Me and my fiance got engaged last year december. The plan is to get married probably by the end of this year or early month next year after he finished another contract of his work. Now, here is the thing I guess our marriage will be a bit early now since I am a teacher and I am pregnant and I wanted to keep my work as I love working and teaching little children. So we decided to have a civil wedding as soon as possible.
Here is my question my fiance is with his best friend living in australia, he's having a few weeks vacation there and will be here this coming feb.
The question is it possible to get a CNI in Australia? if so, does he need an original copy of his divorce paper with him? and how long will he need to wait to get the CNI in aus.?

Another thing, if the aus CNI will not work.
Is it possible to get a CNI here in the Philippines? How long it will take?
Thank you, hopefully you guys can help us.