Vision makes multi tub size racks, but their racks aren't enclosed for the room that they are in will need to stay at least 75 degrees all the time (slightly higher is better)

http://www.visionproducts.us/htm7/racks.html

Animal plastics makes hatchling/juvenal racks. These won't hold full grown adults, but should last a while. (I suggest the IRIS series racks)

http://www.animalplastics.com/