Did you manage to get a solution?
I am in exactly the same position, my old XP machine crashed terminally and when I came to install V9 Pro in my new Windows 7 machine it all seems to work but I have misplaced the original registration card with the number on it. Bummer!
I have tried to get the number from the UK distributors but they are asking for an order number which I may have had when I purchased it but since that is about ten years ago it will be long gone.
Alternatively does anyone know of a way of getting the number?