My VXR had ISOFIX. It was a 56 Plated Car but like most others it was made in 2005. You should be able to find one with ISOFIX. Some dealers that I spoke to did not even know what ISOFIX was let alone if the car actually had it.
My 56 plate certainly has the anchoring points, although I thought this was the US version of ISOFIX (I think they have another name for the same thing).