Googsy very kindly sent me his spare Nav DVD recently. We weren't sure whether his was newer than mine, so the deal was, I donated a small sum to the forum, in return Googsy sent me the DVD, and if it was older than mine, I said I'd post it back up here for someone else to take the same deal.

For reference, I found the part numbers and relevant maps:

YIW500012 - 2004 (05MY) Q3 2003 maps
YIW500013 - September 2005 (06MY) Q3 2004 maps
YIW500200 - September 2006 (07MY) Q3 2005 maps
YIW500250 - April 2007 (08MY) Q3 2005 maps

This DVD is the first on the list, xxx12. If you want it, it's delivered to you in return for a fiver to Martin!

Check first but as far as I know this only works on touch screen navs.