Kawasaki Sportsbike Riders Club - Australia - Online Forum

I am having trouble trying to find exhaust slip-ons for my 500R. I found very few sites that actually have them. They are way over priced as well. If anyone knows of any sites, Or if there is any compatibility with other bikes, I would love to here from yah. Thanks for any help.
Any websites or any knowledge really would be of much help.