Smaller rudder for V10

I'm after a smaller rudder for my epic v10. I only want to use it when doing the flat water races (river). The standard rudder seems to catch every bit of weed in the water. Does anybody know where I can purchase one, I live in Sydney. Thanks Rob

Most people here just cut the 8" rudder down to 3.5". I made one out of plastic a locker company gave me and shaved it down to thinner than a stock and tapered on the bottom too. Mine's just over 3" and on rivers and lakes it's perfect. I also have the onno P 41 kick-up rudder for really shallow rivers. So that's another option. Chaz