Natick (Mass.) Contributory Retirement System is searching for a private equity manager to run $3 million in a fund of funds, confirmed Rosemary Guillette, an analyst for Segal Advisors, the plan's consultant. A selection will likely be made in June. Kathleen Bacon, director of the $70 million plan, directed all questions to Kevin Leonard, the Segal Advisors consultant who is assisting. Mr. Leonard was unavailable for comment at press time.