For collectively bargained employment contracts, see BNA's Collective Bargaining: Negotiations and Contracts or Basic Patterns in Union Contracts, CCH's Union Contract Clauses and/or Drafting the Union Contract.
For entertainment industry contract clauses, see volume 4 of Selz & Simensky's Entertainment Law and/or a treatise called Entertainment Industry Contracts.
For a variety of business contracts, see Business Laws, Inc.'s Model Agreements for Corporate Council. or just American Jurisprudence Legal Forms. In addition, business contracts are often attached to SEC filings as Exhibits. You can find some of these Exhibits posted free at oncle. Otherwise, use LIVEDGAR or one of the other searchable databases discussed in the Filings section of the "Securities and Exchange Commission" entry.