[R-390] Gear Clamp Needed Please

[wb6orz]

    Hoping for help, please:
    I need an oddball gear clamp for a 390-A.
    I got a few of the typical clamps listed by Fair, but I need a larger one. The ones I got are like 99% of the clamps in the radio, about 1/4", but the one I need measures (open) about 3/8". Looking down at the RF Deck, it's the one which connects the .5 to 1 MHz RF lifter and cam. It's on the shaft that operates the gear train and it does double-duty, since it clamps a gear on to the shaft and also on to a sprocket.
    Thanks in advance!
    (((((73)))))
    Les
    ---===WB6ORZ===---
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