My advice is skip the store-I can't think of anything I would possibly need for my snakes at a big box store.
http://www.reptilebasics.com/ sells hides, some thermostats and just about anything else you could need.
I prefer herpstat thermostats http://www.spyderrobotics.com/ but VE or rancos can work too depending on what you need.
PVC cages or tub setups are recommended for snakes, secure, well enclosed, hold heat/humidity, lightweight. Tub heating is flexwatt/heat pads or room heating, with a pvc enclosure I do under tank heating and/or radiant heat panels. Animal plastics, vision, boaphile and a ton of other companies make a variety of quality options.
In the meantime go pick up a lamp dimmer to somewhat regulate your heat pad or unplug it until you can get a thermostat on it.