Sous Vide Immersion Heater Support

The Sous Vide rig described in Make: 25 http://makezine.com/25/sousvide mounts the immersion heaters permanently to the bottom of the control box, and then the whole works sits up on top of the water bath. Many have built modular versions, with an outlet on the control box to power immersion heaters, or some other heat source. This Thing is designed to mount three immersion heaters atop the ceramic insert (crock?) of my oval shaped Crock Pot. I split it into two pieces for printing on my Ultimak