Hello all.... So... broke a rear cylinder exhaust stud off. Attempted a reverse drill-bit extraction, but no joy (still some of the steel stud left in there and oversized the hole). Dropped engine out of frame and off to the machine shop I went. Machinist wants me to take the head off.... but I will only consider it if there are replacement head gaskets available. Tried my usual parts hook-ups but no go - "unavailable". Does anyone know if they are out there somewhere? Link to a supplier? Thanks.... Blair