Hey, not a problem!
Here is the link to the part. As far as I know, there are only two of these actuators on board: one for the driver, left side and one for the pass, right side. So whatever side is not working, that is the side you need, thus the passenger side like me.
Do a quick check before you buy a part. Unplug yours and remove it (held in with screws). Turn the car on, heat on, and turn the shaft end by hand, moving it up and down like the actuator would, will then give you the heated, or cold air.
http://cgi.ebay.com/ebaymotors/1998-...Q5fAccessories