rear tyre

[Pastor]

Hi, after 8 months I am well enough to get on my bike occassionally and need to purchase a replacement rear tyre for my 'busa. It has an Avon Storm ST Ultra on the front and looking to replace the bald Bridgestone on the rear with an Avon Storm 2 Ultra tyre. I am in Brisbane and heading back to where the bike is in Armidale in NSW in a week or so. Any ideas where I might be able to get a good deal to purchase the rear tyre I am looking for in Brisbane? Much appreciatded for your help. Pastor