I added a set of 8 ball knobs with engraved shift patterns to my '08 X.
The knobs were made by EPCO Mfg. The t-case is a 2", and the
6 speed 2-1/4".
I added an inch of threaded steel with an upturn to the 6 speed lever also.
I modified a stock JK shifter arm. Cut the nub off of the end, center drilled it and modified a 1/2-20 bolt to fit into the arm, then welded it up.
It puts the shift action into a more natural movement for me, plus the knob is smooth. Never did like the stock knobs on the JK, and nothing available for replacement suited my tastes.