Check out these people: http://www.pcpowercooling.com/ Also a list of competing vendors here: http://www.tdl.com/~netex/cases/cases.html

Yeah - so that. I got a second hand winbook w95 laptop which ran so hot that it finally depolymerized the case and it shattered around the frame holding the LCD screen. I have it still unfixed because they wanted about $900 to do all that needed to be done - and I had spent $500 to buy it in the first place. It is unusable as it is now, and it was a wonderful laptop. It was my only means of communication when we came back to a house burgled of all electronic equipment!