If you go to this link belwo you can get the termprature controller, I've also toyed with the idea of having a LCD incorporated to show the temp of the Peltier.
http://secure.oatleyelectronics.com//index.php?cPath=80&osCsid=2c1ed9960 98ba9ab78e39ca7aa4560e2
PM me your design mine looks simlar but attached to the base of the camera
