Greg, and I talked about his theory today. Then I had to go to Sams with my wife, what joy I had. Sams had a $90 portable fridge, pretty cheap but it is 23 1/2" diameter. My computer which is a large Atcs Cooler Master which is 18" long x 8 1/4" wide x 21 1/2" high and corner to opposite corner 20". (I included Bob in my picture for scale.)
Seems like condensation could be a problem though, as discussed in the below link. But maybe if you install some silica gel like someone was suggesting. Also, Michaels sells silica gel. http://www.michaels.com/art/online/home
http://www.thebestcasescenario.com/forum/archive/index.php/t-1059.html