So i bought a Mugen cf long shift knob and it had approx 1.25" gap from the base to the bottom of new knob.
This is an easy fixer uo to solve that problem. Very cheap and very light.
What you need:
1) Molding clay.( i used crayola air dry. Worked perfect and easy to mold.)
2) Aftermarket knob(obvious lol)
3) drill with proper diameter drill bit(varies in size needed)
4) stock shift knob.
5) sand paper
6) paint of your choice.