Hey Bob,
I replaced the stock fan in my 2000 with one of these and it works great!
http://www.mouser.com/index.cfm?hand..._pcodeid=66400
It's 52 x 52MM so it replaces the old fan perfectly. Better yet it provides 12 CFM or airflow versus the 8.5 CFM from you stock fan. However, it is a little louder than your stock fan. You will need to cut the connector off of your old fan to install this one.
Kelly