Try Outdoor Emporum or SportCo. I heve purchased them there before. Also take a look at http://leelockas.com/fordrift.html as an alternative.
Best bet is to look at a couple boards called Ifish and Steelheader.net. You'll find guys selling them used more then about anywhere else. Put ads up both under the classifieds, you'll probably get more hits. But Sportco is one of the better places, and I think Sportsmans warehouse has a few too.
