At a computer show I was just at (TCF for those "in the know") i decided "what the hell" and got a little 24w TEC to play with. well its cool (pun intended), hooked it up to an AT PSU with a retail intel heatsink and it got cold. Awesome! Now I'm thinking about getting a 172/220 for my computer (for a 2400+ overclocked heavily I dont know whcih to get), but I honestly dont know where to even buy the things! Obviously I'm not going to just go and buy one on a whim and hook it up (took me 2 years to get WC

), so any help is apprecaited on where to get em. I find lots of places telling me how to hook em up, but no place that sells em.
Thanks in advance!