Here's what I've made and been using. It only fits one primary/secondary in it, but it's all I need. My friend built two of these.
http://sdcollins.home.mindspring.com/FermentationChiller.html
What's up everyone in the homebrew community! Found the forum by doing a search on Google. I've just bottled my second batch (Newcastle Brown Ale Clone). Can't wait. My first (Pale ale) batch turned out pretty good, in my opinion. It tasted like beer! A few of my friends just got into...