The National Peace Corps Association says it's looking for about 100,000 good volunteers.
They're people who served in the overseas development program at some time in its 50-year history but later lost touch with their former colleagues.
NPCA President Kevin Quigley says there's no complete list of the 200,000 Americans who volunteered for the program, in part because key records were lost during its early days.
"When the agency was in its infancy [in the early 1960s], a lot of systems for tracking former volunteers just didn't exist," Quigley says.