Magazine, trade publication and newspaper articles can be excellent sources of information about industries. Try searching for the name of your industry.
If you get too many results, try narrowing down your search by adding in additional keywords or terms related to what you want to find out "about" that industry. Are you looking for sales, projections, trends, forecasts or something related to their supply chain or operations?
If you don't get any results, you may be using too many keywords or need to think of your industry more broadly. For example, if you can't find any information on the pen industry, maybe you should look for information on the office supply industry.