2stroke,
Welcome to the board, and nice looking car!
I jsut replaced all the shift bushings on my car 3 weeks ago. The shifting all of a sudden got very loose. Upon inspection of the shift coupler, the shift bushings had blown apart. There were pieces of the bushings on the floor of the coupler area.
I ordered the kit from our host:
Porsche 911 & Carrera Shift Linkage - Page 1
I already had some brass replacement bushings for the coupler, but I ordered the complete kit cuz i wasn't sure which bushings i was going to use.
It is not hard to replace them, Ed the coupler whisperer, has great video on how to replace them:
Coupler Service - The Coupler Whisperer
On this site you can also order the bushings or the complete coupler.
For me, it was just as hard to get the console out to get to the front 2 bushings as it was to replace all the bushings.
After all the bushings were replaced, very tight, precise shifting, and no slop once in gear.
Before you do anything with the rear coupler, mark on the shaft of the coupler where the shift rod from the front attaches on the coupler. I marked mine with a sharpie pen where the depth of the shift rod on the coupler and where the split in the shift rod was on the coupler shaft. This will give you a starting point for reassembly. I just needed minor adjustments to get it right after that. Some people say to put the car in first gear also before starting the removal but I can't remember if I did that.
Good luck, and keep posting questions as they come up.
Craig