I got the shift throw shortened as part of my Transmission Rebuild, and added a 2G shift knob, but there are other ways:
SHORT SHIFTERS:
Pace Setter “Quik-Shift” Adjustable Throw Shifter:
Extreme Motorsports short-throw shifter:
Extreme PSI short-shifter:
Other possible short-shifter brands:
Pilot Motorsports short shifter http://www.pilotautomotive.com/pilot3cg.htm http://www.dsmtuners.com/forums/showthread.php?threadid=83771 http://www.splittingimagez.com/sishortshifter.htm
Rollhard short shifter (can't find a URL for it)