Cheers Andy, the part number in the AOC thread is the one they have on CAD.
29-609 is the one they have, which according to AOC is for the older model than mine (<07-2000). However, it also says that the one which they produce for Sony equipment is the same, and I already have a harness fitted at the minute for my Sony head unit to use the steering wheel controls. I may just need to Stereo specific harness then?