The aftermarket short shifters typically come with their own replacement bushings. In fact, one approach if you want to remove bushing play, but keep stock shifter throws, is to purchase an aftermarket short shifter and keep its aluminum bushings, and just throw away the short shift mechanism.
By the way, here is a special tool I made by modifying an Allen wrench, for easily removing the Phenix engineering GT3-style bushing's retaining clip while the shift console is still installed in the car:
Threaded Mode
