Firstly, where is it leaking from? If its from the gasket seals around the water pump body, you can use rtv sealant to re-seal the water pump.
However, if it leaks from the pulley bearing, I'm afraid you will have to change the entire pump.
Dear All Altezza Guys And Gals..
2010 Bring To You An Abundance Of The Precious Things In Life: Health, Friendship, And The Love Found In Moments Shared.
Happy New Year...:wavey: