Most tend to stay away from them tbh. The throw in the Zed is already pretty short, so not sure you'd want it much shorter. Although I think Bronzee has fitted or knows people with short shifters and find them good once set up correctly with the right weighting.
What I and a lot of other people have done is fit a nismo gear knob as they are lower it actually shortens the throw a little, but definately noticable.
How do you find the throw now? Unless you really want it shorter there is little point