Under fire last year, the FBI scrapped plans to award a huge sole-source contract to Motorola Solutions to replace the bureau's aged two-way radio system. But the Schaumburg, Ill., firm appears to have the inside track again. Motorola's chief rival, Harris Corp., has filed a formal protest alleging the bureau's new request for competitive bids is skewed so that only Motorola can sell the bureau over 26,000 of its glitzy emergency radios. Nader Khouri MCT