Taunton (Mass.) Contributory Retirement System has restarted a search for core/income-producing and value-added real estate managers, after the June hiring of ING Clarion Lion Properties Fund fell through. Officials at the $134 million system want to boost its real estate allocation to 8% from 6%. The source of funding has not been decided, said Kevin Leonard, the Segal Advisors consultant who is assisting. Paul Slivinski, executive director of the system, did not return a call for comment.