Or grit your teeth and drill a hole through your hull like everyone else does. Not too sure why people suffer paranoia about through hull fittings. Tie a softwood tapered bung nearby and have a hammer on board (or use a winch handle!) if you are really worried about sinking. (You are MUCH more likely to sink through sudden grounding or being run down I suggest.
Millions of boats sail millions of miles with through hull logs...
-------------------- “When you discover that you are riding a dead horse,
the best strategy is to dismount.”