Identical hides can be as inexpensive as $.25 each. Go to Dollar Tree and get a set of four cereal bowls and solder out an entrance like these:





The digital thermometer/hygrometer can be found in most Walmarts in their hardware section (just ask them where their indoor/outdoor thermometers are). This one is $12, measures two temps - I put it on the cool side, and run the probe to the inside of the warm hide - and humidity.



Acurite is just one brand, but any indoor/outdoor digital thermometer will do. If it only measures one temp, you'll need two.

Pick up some velcro too, I velcro mine to the inside of the enclosure at ground level.