I stumbled upon these...

http://www.constrictors.com/images/Facility/Shop1293.jpg
http://www.constrictors.com/images/Facility/Shop1290.jpg
http://www.constrictors.com/images/Facility/Shop1291.jpg

and making one...

http://www.arbreptiles.com/cages/incubator.shtml

Best of luck to you if that's what you end up doing! I'm going to be buying a Hovabator in the next few days since I should only halve 1 clutch this year. Best of luck to you and talk to you later!