speedometer drive gear.

[cos]

Hello  Members  Looking to buy a  speedometer DRIVE gear 56/57 thunderbird T-85 OD trans. Fords # is MC-17285-A has 8 tooth L helix.  This gear was also used in 55/56 ford with auto trans and 55/56 mercury T-85 and probably auto. Hoping someone a core parts trans might have one. Thanks