Chum Man's correct, supply of decent cork and the demand from deeper pockets has made it tough. If money's no object you can still buy quality cork rings, glue em up, and turn down a fine grip, but all my recent builds over the last 6 yrs or so have gone to carbon fiber, which I kind of like better now anyways,
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"Laugh if you want to, it really is kinda funny, cuz the world is a car and you're the crash test dummy"
All Hail, The Devil Makes Three