I'm curious about this Silenx fan. I've seen SEs with various fans (DC Pico Ace, Elina Fan, the notorious "rat cage") but have never seen one of these in a stock SE. Of those three I find the Elina Fan to be the quietest. I'm guessing this Silenx is a third-party replacement fan. If so, where can they be purchased in sizes that would fit a vintage Mac and how much would they cost? I'd be especially interested in silencing a Classic.