The factory key switch is no longer available. This is the case with many ST parts. NAPA will have a suitable replacement in their Echlin line. The standard alternator is 20 amps. That is the standard for a Honda industrial engine. Add a snowplow, salt spreader, extra lights, and worst of all a cab heater, it just won't work. If loads are intermittent, try a larger battery. There was an optional alternator kit that provided 55 amps through a belt driven alternator. These parts were very hard for us to find.