Having trouble finding an automatic thermostat

I was looking for something to regulate the temp. while I'm not home. I cant find it anywhere all I found was the dimmer that I bought from Petsmart. I need something that will alter the temp when it gets to cold or hot. Any links, advice or anything that will help will be appreciated. Thanks in advance.

This is what I use:

http://www.petsmart.com/product/ind.../PET/2862255&fbc=1&parentPage=family&keepsr=1

It works fairly well.

The ZooMed 500R is good for a low cost thermostat. but I recommend getting it somewhere OTHER than PetSmart. Petsmart charges full retail , $39.99. Other online dealers sell it for about $22 plus shipping. reptilesupply.com reptiledirect.com are 2 decent sources.

we use a company called lucky reptile
i got a pro11 thermostat digital controller controls heat and light 24 hours a day, i have mine set for night and day temps and is very accurate along with my hydrometer and thermometer(exo-terra) it gives me peice of mind as i am one of those sad people where i would be up every hour like the snake was a new born baby if i was unhappy with the temps... cost me £54 british pounds but worth every penny

I ordered 2 of these about 2 hours ago. They should fit the bill for what I need, I sure they would work for you.

Whoops

Forgot the link:

http://www.reptilebasics.com/Ranco-ETC-111000-Pre-Wired-p-16172.html