Matt, i bought one from Rayy Design.
About £45 all in.
Eay to fit once the box is out and it makes the box feel a lot better as Gus said.
Have to knock the split pin out of your original gearstick and swap the bottom half with the q/shift one.Just have to take the cradle off the box and take a bolt out a circlip off and the stick will come out of the box, easy.
Well worth doing if your box is coming off anyway.
Dave.