A mobile car locksmith might be a solution for you - my guy had a little inflatable bag (air wedge) that "sprung" open the gap between glass and panel - he then hooked the mechanism open. Bingo! Two minutes work.
http://www.uklockpickers.co.uk/oscommerce/catalog/images/airwedge%20new%20pic.jpg
Good luck...
Peccavi
November 2009
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