I didn't mention NAPA because recent post by member indicated they offered him plastic. If NAPA available to you then specify metal impeller.

If only plastic avaiable to you locally make sure its tan or off-white and not black.

EDIT @ 7:30am:
Oops, I got it reversed. Autozone was the culprit, NAPA the solution, here's the thread:

http://www.contour.org/forums/ultimatebb.php?ubb=get_topic;f=3;t=007740


98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both