I was helping one of Prof. Cherney's students this morning look for financial statements from the 1980's for Amre Inc. We were able to find balance sheet/income statement numbers in the Moody's Industrial Manuals.
Another source for old statements is the NAARS collection in LexisNexis. Choose "Business - Company Financial." Type in the company name and from the source box choose either NAARS Annual Reports 1972-1984 or 1984-1995. In some cases you will find only the consolidated financial statement, in others, the financial statement with footnotes and auditor's comments.