ManiacQuilter2 is correct--you will have to prove you are a "business" entity before companies will sell to you at wholesale (at least in the U.S.) If you are in Australia, you will need to find the distributors for the various fabric companies and that information is generally on the manufacturer's website. For instance, here is the information for RJR fabrics:
http://www.rjrfabrics.com/about/distributors.cfm
Dayview is their distributor in Australia and they carry several fabric lines in addition to RJR.