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.
Once the trademark of an exotic that calls the Middle East home, the full-out, retina-shearing practice of chroming a car is now being done under the banner of...