One of my favorite daily reads is Bring A Trailer, where you will find daily postings of the best vintage cars on sale from around the world wide web. From exotic rarities and dream machines, to barn finds and bargains, you'll find it all on B.A.T..
Every once and a while they post a vintage rig that would make a great fish mobile, this 1980 Jeep Cherokee Chief for only 3K certainly fits the bill.