Great source of business articles. Use it to find out what marketing techniques other cider companies have employed, articles about current state of cider industry, etc. Hint: Use the Advanced Search link under the search box to see additional limit options, such as a search box for NAICS code, company name, ticker symbol, etc.
Great for all sorts of statistics - number of cider consumers, etc
Where in Pittsburgh Can You Find Cider?
The websites of cider companies often have maps for finding bars/restaurants, as well as stores, selling their product. Here are the locators for the top three brands in 2014 according to Statista:
Angry Orchard (has a very large portion of the market, so this alone should give you a pretty good indication)