heating pad and thermostat

what type of thermostat can i use for a Dunlap human heating pad that wont cost me too much and where can i get it?

anyone using this type of setup??? someone said that LLLreptiles.com had some but i dont know which type and i have no experience with thermostats and how they work

I am about to buy 2 of the $14 ones from LLLReptile. It's what I can afford so hopefully they work well enough. Thermostats have little dials on them that you can set the temp on and they regulate the heat pad, turning it on and off, keeping the temp at a regulated degree. You just plug the heat pad into the thermostat, then plug the thermostat into the wall. I'm just getting 2 of them since I have 2 heat pads, and want each of them to be at different temps.