If you don't already have the financial info you need, you'll find it quickly here.
Be sure to also use the Industry Surveys in this database -- these will be one of your best sources for hard to find info.
Investor Info Sources
Could investor sources also be useful for marketers?
S&P Industry Surveys are very high quality and are updated twice each year.
Don't be discouraged if a report seems to cover a much broader industry than you are interested in--the Survey reports usually include information on various sub-segments of the industry and often developments in the overall industry will effect your industry segments. For example, the tire industry is greatly affected by develpments in the overall automotive industry.
The Industry Survey will also include a references section that may provide names of organizations, trade periodicals, and other sources that may be useful for your project.