Wanted: speed sensor part #

Simple question for someone that has the info....I need the part number for the speed sensor gear that is attached to the diff inside the tranny. Im putting a msp tranny in my non-abs car so I need to install the speed sensor gear in it.
Ive heard that most people use the gear out of a protege 5? My local mazda dealer is giving me hell trying to find the part number. Any help is MUCH appreciated. thanks, rory
 
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