Usually pet stores do not have very good options for tstats. I do not know what to tell you being where you are. I personally use Herpstat by SpyderRobotics. http://spyderrobotics.com/home/products.html

Here are some other options:
http://www.reptilebasics.com/thermostats
http://helixcontrols.com/?page_id=42

Is the temp in the hide the surface or air temp? If its the surface, whats the air temp?