This extruder mount was designed to keep the position of the nozzle as close to the stock's one as possible, so your printing area won't be affected. It's rigid but light, and has a place for a standard cooling fan.
Requires a pair of 3.5mm self tapping screws (4mm will work as well, with a help of lighter)
PLA, Nylon, PC
The mount should be placed horizontally in XY plane, so the fan mount would be in YZ or XZ. Of course, support is needed