OT- Aussies, I need your help.

Hi there! My sister lives in Bunbury, WA and she is looking for places to shop for a dress for her daughter's wedding at the end of the month. She is having a very hard time finding stores for larger sized people and really just does not know where to look. She is looking for something in the range of a size 24-26. Could you suggest any places that would have larger sizes, dressy kind of dresses? Any help I would greatly appreciate. She tells me Perthe is about 2 hrs. away but she does not know where to shop, so any store names would be helpful. Thanks! Jane from wisconsin banded 4/8/05