Like other people said you could use heat packs. Here is an episode of snakebytes and they show how they package there snakes for overnight shipping. You could do something similar to this with a box or tub, some Styrofoam, newspaper, and heat packs as long as it was only for a few days. Providing water and ventilation of course.
edit: forgot the link, lol
also if you want to skip ahead to see the shipping set up its at about 3:20
http://snakebytes.tv/index.php?optio...d=80&Itemid=14