With over 400,000,000 members, LinkedIn is one way to find industry stakeholders. The Premium membership offers access to the personal profiles of LinkedIn members that are blocked in the free membership. There is a free trial available which you will see linked at the top right of the landing page, http://www.linkedin.com.
With a bit of work, you may be able to find more information on the people whose profiles are behind the pay wall without paying.
To search for industry professionals:
Some profiles will be available for viewing and others will be behind a pay wall. You can try a couple of different methods to find more information.
Trade associations, trade journals, and consultants may be able to provide names of people to interview or be willing to talk. You can use two resources via the Libraries, NetAdvantage and IBISWorld. Reference Solutions is available via Daniel Boone Regional Library (Columbia Public). You will need a library card from them to access it.
Search 14 million U.S. businesses and 135 million U.S. residents for up to date information. The U.S. Business database may be searched by business type, size and geographic location. This source is available through the Columbia Public Library/Daniel Boone Regional Library. You must have a library card from them to access.