I took the fan from my broken Diablotek powersupply (from a Printrbot LC) and made a mount for it by using CursedMagicians Mount as a starting point. I used Sketchup to design it and Netfabb to fix it.
0.2mm Layer height
Just print the stl, screw on the fan, lenghten the wires, mount everything.
Maybe you will have to work on the holes for the screws a little bit to make them fit.