Gear knob

Could anybody tell me the screw size of the gear knob.
Lookin for a ARC titanium gear knob.
Starlet sizes are not in the list...

M8 x 1.25 - MR-S (sequential automatic), March
M10 x 1.25 - Silvia and Skyline (non 6 speed), Lancer, RX-7, Miata Roadster
M10 x 1.5 - NSX, S2000, Integra, Civic, Accord
M12 x 1.25 (no step) - BNR34, JZA80 (6 speed)
M12 x 1.25 (step) - MR-2, Mark II, Impreza, Legacy, S15 (6 speed), Altezza (6 speed), Wagon R

http://www.rhdjapan.com/arc-circular-mirror-finish-titan-shift-knob-45mm-51529
 
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