If you like the funky heads like Kiteslinger uses for his stakes...check out this site to order them. But, like he says...they are not cheap. They are however used as shift knobs and are ready to mount with the right threaded stake!
Gotta love Big Daddy Roth and the RATFINK influence!!
http://www.ratfink.org/shifter_knobs/index.html
Good luck,
Patrick