Well id start at your local pet shop, they normally stock a few birds and if not what your looking for than you can ask if you can have the contact number of the breeders who supply them.

Secondly, check the net, thats the quickest way to find links to breeders in your area, even if you have to travel for a small amount of time to get there.
Problem with the internet is it also throws a lot of false leads your way so be prepared for a long trawl through various websites.

Hope this helps and happy 'hunting' (In a non offensive manner )