All that that package is made of is a 12V transformer, and a couple computer fans (which are all 12v). Once you have a 12V adapter, you could visit any computer parts retailer (newegg, frozencpu, etc), and buy whatever you want for fans. I would go to SVC.com and get Panaflo fans though. They come in 120mmx38mm, thicker than the normal 25mm, and more air as well. Then, rather than a temperature sensor, I would use a rheostat (common for computers) to control the fans. That way, you decide the fan speed. OR, you can buy 'Smart fans' from thermaltake that can do both/either depending on how you set them up. But by far, the best fans around are the Panaflo's...