You could go to Walmart, Kmart, Target, Walgreens, CVS, etc and get a few heating pads to get those temps up. Normally I'm not a big fan of using them to heat cages because they are prone to hot spots, shorting out, and even catching on fire, but with temperatures that low your snake runs a very high risk of getting a respiratory infection so even though you'd have to watch the setup very carefully, it might be worth it for the sake of your snakes health.

Also, I would not feed that animal until you correct the temps and let them stabilize for at least a week. Otherwise, you could run the risk of creating a puker.

-adam