Sanibel (Fla.) General Employees Retirement System is looking for an active domestic core fixed-income manager to run $3 million, confirmed David Lee, director of manager research and principal at Dahab Associates, the funds consultant. Trustees of the $12 million fund will consider separate accounts, institutional commingled funds and institutional shares of mutual funds. The $3 million fixed-income portfolio is currently invested in the Florida Municipal Investment Trust. System officials are looking for better returns, Mr. Lee said. The RFP is available at http://dahab.com/searches.html. Proposals are due by 5 p.m. EDT April 11. A timetable for a selection has not been set, Mr. Lee said. Renee Lynch, the citys finance director, referred questions about the RFP to Dahab Associates.