Win 7 Upgrade - missing Dell Desktop Dock

I upgraded my wife's VOSTRO 1500 from Vista to Win7 Home Premium and would like to include
the now familiar Desktop Dock. I downloaded several available via Google, but non worked, and was told, when trying to install,that the installation could not proceed
as the computer initially came without the Dock. Is there anyone out there with a practical hint, solution or downloadable link, please?
Everything else work very well. I have a XPS Studio and do, like my children, appreciate the finctionality of the Dock.
Thank you very much for your help.