Big box stores carry an assortment of knobs. Worth a look see.
i can help with you with rodholder attachments but not with the knob. You might try to order a replacement from Millennium Marine. If you want to order the rodholder attachments, please visit my website at ELITE PRO MARINE
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Wes
Elite CNC Routing & Woodworks on Facebook
Millennium boat seat cup/toolholder maker.Pondbuster thanked you for this post
Big box stores carry an assortment of knobs. Worth a look see.
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va