http://www.helixcontrols.com/
http://www.bigappleherp.com/Reptile_...ts_921100.html
http://www.spyderrobotics.com/products/herpstat.html
http://www.boaphileplastics.com/thermostat.html

Here are just a few of the better ones , I agree totally with vaughn if you have snakes a thermostat is a must