I dug around in the shed and found an original throttle cable, I also found one for a 2lt Escort. It is around the correct length but has two nuts and a threaded section to adjust the overall length, the existing factory item does not. I am going to make a simple bracket to mount the Escort cable to the existing factory bracket, this is so I can have a wider adjustment range and also hope to cure the car of idle speed changes between cold starts and normal running temps, the idle changes by 300-400 RPM from cold start to normal running temp. I also did investigate the use of an XD or XE Falcon item and as they have a Weber and the same type of peddle connection with a plastic holder that has a single screw fixing onto the fire wall, they may be able to be used also.
Scott