I often use West's Legal Directory . Experience has taught me that cold calling will often not get you directly to the attorney - so don't even try. What you are looking for here is the kind hearted secretary or paralegal who would know the whereabouts of the transcript within the firm. Sometimes, you will find the law librarian who has a cataloged collection of prior testimony at her fingertips. If the transcript is easily obtained, often it will be sent at no charge.
Some firms charge but that is rare.
If the file is older and warehoused offsite, then good luck. There are some commercial services for obtaining prior testimony. They include IDEX and Westlaw which has an agreement between the U.S. Court Reporters Association and the National Expert Transcript Service . Users can preview abstracts of transcripts and then order the full-text document. Conclusion Finding and investigating expert witnesses is often time consuming and expensive.