I searched high and low for exterior trim parts and agree that they're hard to find for the '97 pathy.
if you like the more understated look (no fancy little wires and stuff) Go Industries has a decent one:
http://www.truckaddons.com/Catalog/subp ... guards.htm
I got it and it looks okay (my old one looked better but rusted out), but the attachment is just on the bumper, which i'm not crazy about. I will make some simple plates to secure it to the 2 front attach points near the tow hooks.
I also got a really nice pair of stainless steel nerf bars to replace the nissan ones that rusted out:
http://www.truckaddons.com/Catalog/subp ... f-bars.htm
The price is pretty reasonable for stainless ($229), they look nice, and they should continue to look good, probably long after the truck dies.
The site seems to have a few styles to choose from.