http://www.amazon.com/R-Zilla-11403-...1471608&sr=1-4 - $22 for a thermostat
http://www.amazon.com/Zoo-Med-ReptiT...1471878&sr=1-1 - $17 for a digital IR thermometer so you can measure temperatures on the top of the substrate, which is where your BP lives.

Total is less than $40 shipped to your door, which is much less than a regular visit to the vet, never mind one to treat a burn.