It's been around 1000kms since my steering rack was replaced and I thought I would give everyone an update. While the noise is still there, it is not as bad as before, but not perfect like others without the problem. And it might be my imagination, but I think it is slowly getting worse. Could be due to me driving over the same crappy suburban roads and loosening it up.
I was recently contacted by the service department about a new steering rack which has been designed to fix the problem. They have ordered it from Germany and like the last one, won't arrive for another 3 weeks. Hopefully this will be a permanent fix for those unlucky enough to have the problem. And if it is, we can get back to really enjoying our cars!