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I just ordered a Miataroadster short shifter for the Miata and I am trying to locate a specific knob. I want a white ball, much like an old Chevy 4 speed ball. The catch is I have a 6 speed and I want the 6 speed H pattern on the ball. The best I have come up with was from a website called sickspeed.com but his have reverse up and to the left. The size I need is 10mm X 1.25. Any help would be appreciated.