i looked into it briefly here in adelaide but found the complications in doing it here too hard.
A. Yes as Vinjx mentioned, it is nearly always with someone you know. Otherwise you need to go on a very long waiting list or try to find someone yourself via various web sites.
B. if you are lucky enough eventually to find someone here willing to donate, both parties need to then go through months of counselling to ensure you & donor are mentally ok to do this, & to determine how much of a role the donor will play in the child's life.
I personally did not want to do this. For me time is of the essense so didn't want to waste time searching, counselling etc & I also felt uncomfortable with knowing the donor.....would I always look at my child & see this other person?
It's a very personal choice.
Hope this helps. Good luck