According to our Estimator function (top of the screen, click on Estimate), the timing belt for your L200 in your Houston area should cost between $325 - $416, parts and labor. The water pump in conjunction is probably another $250-$300 parts and additional labor.
First the L200 (2.2) has a timing chain not a timing belt in a 2001 Saturn. There was a recall number NHTSA070519000 in Novermber 7, 2007 (please call your dealer with the vin number and see if it was done). Otherwise the cost for water pump anf timing chain would be $724.00 parts and labor. Hope this helps.