i got a black carpet and mats from 1A Auto. heres the link...
http://www.1aauto.com/carpet/mercury/default.htm as far as tips on putting it in- make sure you have a lot of patience, make sure you have a bunch of new blades to cut with, do not cut a lot... just trim the edges over and over until they fit, you dont want to cut too much and after the seats go in realize the carpet doesnt reach the moldings. i would even put the console and seats in, leave the door moldings off for a few days until the carpet molds itself to your floor, then trim it and put the rest of the moldings in.
good luck with it!
