I took my ex press demo Vanquish SDP to the Vanquish day at NP in 2014. It was also used as a development "hack" for the forthcoming S model and retained at NP after its press duties for this pupose until November 2004.
I tracked down David Alderman, who was the final inspector of my car to get him to sign its owners manual cover. Not only did he do this, but got all the other final inspectors to sign it too ( Stuart Bull, Thomas Clark, Paul Wrighton, Steve Miller, Chris Sheldon). He also tracked down Ian Minnards ( Project Manager for the Vanquish), Ian Callum (designer) and Vini Ryan ( Chief Tech, who did lots of the development work on my car) to sign too. What a day!