CTC Printer - Silent 80mm fan Mainboard Makerboard Adapter

After I installed really good shock absorbing feet (Spring based, http://www.thingiverse.com/thing:1392657), I found the only loud thing left was the fan blowing onto the mainboard under the printer. It was a small 40mm? fan and it was mounted in such a way that it rattles very heavily on the wood frame. It's far louder than it needs to be and was actually louder than the printer itself. Ideally the fan being installed needs some clearance at the bottom, so it's best to install this after instal