http://www.trademotion.com/partlocator/index.cfm?action=getLocator&siteid=213787&chapter=DP2FM0&appSectionid=9&groupid=10000&subgroupid=60431&make=10&model=Contour&year=1998&catalogid=1

If you are going to start from your empty system you should get a new drier, vacuum the system and then recharge.
http://www.ackits.com/

Go to their forums and read up, ask questions there and you'll get a fast response.