Among the most talked-about aftermarket growth opportunities is parts distribution. Among the key questions: will the existing duopoly continue to keep the market cornered, or will others step up and grab some share? Anyone that procures parts knows that the market has two colossal players: Boeing Global Services's Aviall business, and Airbus's Satair unit. Together, they have gobbled up an estimated 50% of the global parts-distribution market, Canaccord Genuity analyst Ken ...