Here is a cool website that has lots of great stocking stuffer gifts. The Busted Knuckle Garage - a place for car guy gifts. I know what about the ladies. Well most of the items will work for the ladies too.
The one I like the best and will be adding to my list is the Magnetic Finger Tool.
Other Stocking Stuffer Ideas
Door Handle Inserts
Set of 5 inserts for $35.96
Shifter Knob -Click Here
Some ideas from Extreme Terrain
$14.99 All Things Jeep