Thanks to another member on this forum, I now have a copy of version 12 of the Australian Map CD. It still doesn't have some of the newer estates in Melbourne, but must surely have more updated street data than version 10. It's compatible with MKIII units but not MKIV as this is not a DVD disc.

Just as a side note, does anyone know how to get the Nav unit to display what the version of the disk is? I can't find any information on the files within the disk itself to say what version it is.

If anybody with MKIII wants a copy of this, I'm trying to find a decent site that will host this file.