I have recently purchased a Hunter 25.5. All is in great working order at this point, but one of the Maxwell 17 self-tailing winches is missing the top piece. All it is is a simple part that screws down to secure the other parts of the winch in place. Unfortunately it never turned up. I'd like to avoid buying a whole new winch but I can't find this part. Any suggestions, tips, or spare parts from anyone? Thanks!