Exclusive: Boeing agrees to buy Spirit Aero for $4.7 billion, sources say ReutersBoeing reportedly agrees to buy supplier Spirit Aerosystems for $4.3 billion MarketWatchReport: Boeing makes $4 billion deal for Spirit AeroSystems Wichita EagleReuters: Boeing agrees to buy Spirit Aero for $4.3 billion KSN-TVReport: Boeing agrees to buy Spirit Aero for $4.3 billion KWCH