How would I go about acquiring a corporation's Organizational Chart?

I was igned a project in school last week to acquire the organizational chart for a company I work for or one I formerly worked for. I begin a job in two weeks at Campbells Soup, so I do not have access to their organizational chart yet (getting it through the company, that is). I also used to work for Exelon Corporation and Best Buy. Any help would be appreciated, thanks.