Motorola has made cellular phones for us. They have never supplied any CD Changers. The factory installed changers in Mountaineer/Explorers are supplied by Clarion. Ford has not used any Sony CD changers since 1998. Sony pretty much stayed with the 10 CD models, which are larger than 6 CD models. The 10 CD models are too large to package up front within driver's reach, in the console or glovebox area.
Alpine makes our CD Changers for Lincolns, and for Expedition/Navigator. They do the Expedition one because the two vehicles are built in the same assy plant, and they don't want two different suppliers providing the same part.
A limited number of our Changers (Escort, Cougar, some F-Series trucks), are provided by "FMS" an OEM electronics manufacturing firm in South East Asia. FMS started as an electronics JV (Ford/Mazda/Sanyo) to improve Ford's presence in Asia.
Competition seems to drive the price down. The good news is, you can now buy a factory-installed, hard-wired radio controlled CD Changer for around $350 retail. The bad news is, with different suppliers, and even design changes within a supplier to constantly reduce size, weight, and cost - almost none of the magazines are interchangeable.
cobrajeff