Shower stems for hot/cold water

Hey guys, thanks for letting me join here. I have a constant drip in my shower. I went to ace and they told me that i need to replace the rubber washer on the stem. They didnt have it nor does my local plumber supply. They said that I could order the stem though and replace the entire thing. Since they didnt have in stock and need to get this fixed does anyone know the part number of the stem and washer? I supplied pictures of what I am working with here. Thanks.

That is a price pfister ceramic shower stem

Google it. This one will replace it. Replace the whole stem assembly

The white ceramic disc inside the stem behind the washer is the part that has failed if it's leaking.

Thanks for the quick reply! So this would work for me? http://www.faucetdepot.com/faucetde...fDqTnBkXdMGVS4jctYeXeblocB4J7YELLuxoCCUXw_wcB

Is that a decent price?