ignition switch for a cd28 with yanmar 2gm20f

[sailorpappy]

Went sailing on the Beaufort (sc) river yesterday. Got the sails up, turned off the engine . Couldn't turn off the key to silence the alarm. Then I saw the ignition key on the cockpit floor. Uh oh. The ignition assembly had disassembled. So I turned off the batteries. That silenced the alarm. Sailed back to the face dock. So now I'm looking for parts to reattach the ignition switch or if necessary, buy a new ignition switch with mounting hardware. Does anyone know where to look for these parts? I may have to find a little person to crawl into the starboard lazarette to get a part number. Anyone else have this happen?
Update 8/2/17 .. ordered part and installed today. Even got myself out of the lazarette.