The short answer is Yes, ISO 9001:2000 = AS/NZS 9001:2000, they are the same.
Each country (or at least many of them) has their own entity that is licensed to manage the Copyrighted material from ISO, and ISO provides a list of them here: http://www.iso.org/iso/about/iso_members.htm
In the US it’s ANSI (American National Standards Institute) and some people in the US call it ANSI 9001:2000, but ISO 9001:2000 is an international Standard. For our 'mates' down under it’s AS. But they are both the same ISO 9001:2000 document.
We (The 9000 Store) are not allowed to sell an actual copy of the standard, as we are not licensed, but there are 3rd party webstores that sell them. We refer people to various organizations depending on their location. In the US, we've found Tech Street very easy to deal with.

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