I did the Steeda short throw shifter mod. (replace the shifter shaft into the stock shifter housing) I really liked the improved feel, and shorter throw. But it was not too short! And the kit comes with a billet collar that has positive shift stops (need to be adjusted correctly before you put the boot on)
I would be willing to sell it, as I'm not using it anymore.
Just did a quick search online, can't seem to find the kit anywhere now.