Business Source Complete – from the main page, scroll down and choose SWOT analyses on the right side and search your company
Marketline Advantage - Type in your company name, get results and then select SWOT on the right side of the screen.
ABI Inform (keyword search your company and the word SWOT)
Looking for a summary of a company's business strategy? The 10-K annual report form is one possible source (available on the company's internet site, through the SEC's Edgar database
This material usually comes in their business description, which is Part 1 of a standard 10-K format and early in the doc. You may also do a CTRL-F word find for keywords.