Thermostat Help

[robb4565]

i was wondering if anyone can help me out with a little issue i have ran into. i just built a bunch of cages out of melamine that stack on top of one another for my snakes and lizards. they are heated with radiant heat panels in each different enclosure. the problem i ran into is i want to hook the cages up to a thermostat but they only have one probe and i have 5 different cages stacked. do i need to buy a thermostat for each cage or is there one out there that has multiple probes i can control the whole set up off one thermostat? all the reptiles i keep need the same heat range so maybe there is away around it. if anyone has any knowledge on the subject please let me know it will really help me out. and also if anyone has any suggestions on the placement of the probe, weather i should put it on the hot side, in the basking spot, or in the middle i would really appreciate it.