Faucet in bathroom sink

[CaptainsDaughter]

I have a 2800 SCR 1999 and the cold water knob broke off at the stem in the bathroom so the knob has nothing to grab to turn the water on. It is a Whale 1LUWL98. I only need the cold water knob, and to somehow get the stem piece out that broke off. Any suggestions? I have to do everything myself so basically I have to pay someone ... but thought I would try to do it myself. Thanks!