Hi Borg,
Sorry to hear you have the irritating creaking noise. We're going back a few years so I'll do my best to remember what we did.

As I recall, the noise was most pronounced when the car was hot.

My mechanic told me that there is a fitting in the clutch linkage (might be two of them) that is essentially a ball and socket joint. I guess the ball gets warn and develops a bit of a burr. What they did was to remove it, sand it smooth and grease it. That seemed to take care of the issue.

The good news is this fitting is external so it's fairly easy to get to.

I no longer own the car so I can't tell you how things held up.

I hope this help you!

John