There is a current shifter on the market that replaces the stock stick... not a bad idea but they are $200. We don't like to build just stick's... we build complete shifter assembly's.
Building a complete assembly allows you to get greater control of the overall shift feel and gives you end control of how much throw reduction you add to the shifter.
Would you be interested in a Short Throw Shifter?
Post up if you would and we will get started on the design.