I went to Fry's Electronics for the fan for mine a couple days ago and I explained what I was trying to do. The guy showed me a molex adapter, like this http://www.walmart.com/ip/16318477?w...l5=pla&veh=sem and I bought a little CPU fan. You just plug the adapter into the wall and the fan hook straight into the end and runs fine. He said he's actually had people come in who were building incubators and had the same question so he knew just what to recommend.