Hi Captiva,
You can buy the Tripode oart of the joint over here, if you know the size and number of internal splines where it fits on the shaft. Not sure about on that side of the pond though sorry..
http://www.raceparts-direct.com/prod...Tripode+joints
Most of the drive train is GNK anyhow, i took off the front propshaft and it has GKN in the flange casting.. Maybe worth a try...
Mike