Try these tricks; you may even end up with an image or two to verify the face on the passport photo:

• Society pages on newspaper websites. Go to the newspaper archives at the client's city of residence.
• Google Images and any other image pages on your favourite search engines.
• Regional or national listserves* in the client's occupation or profession, in his or her geographical area.
• The client's company's websites; they generally have photos of company social events.

Remember, the use of offbeat websites usually turns up some PEP associates and/or his family members.

* A Listserve is an internet electronic bulletin board (EBBS) where members post entries of topical interest.