A friend's 101 has a strange module that steps the 24V system down to 12 V and feeds the coil directly. The wire going to the coil from the box is getting extremely hot and the output voltage from the box is fluctuating crazily. Seems the module has crapped the bed. Anyone know of a source for a replacement module?

Just google. Those things don't last forever. They are commonly available.

Thanks, Ron -- any specific reccomendations on brands or models?