Cruise Control Servo?
 

Is there a shop that rebuilds or repairs the Cruise Control Servo?

You could call Beckman and ask. Just checked, they changed their name to Bluelink...., guess automotive computers have marched on a bit. https://www.bluelinkdiag.com/
Say they do actuators, etc. They did my cruise control module (hangs under the dash) and its still working well. The old web-site talked alot about reman of modules for all german makes. Will help greatly if you have the porsche part number.

Why not place a want to buy post on the buy and sell forum. So many folks have removed cruise control that there are lots of spare parts
laying around.

I have a few sent you a pm