Force (formerly Chrysler OBs) used both old Chrysler and newer (after they bought them) Merc parts. The "coil" is just that, though it receives a hell of a jolt from the capacitors in the spark box--several hundred volts.
The way things work is this: The stator simply creates the juice. The trigger coil tells the spark box when and where to fire the coils, and the capacitors discharge into them--pow!
Parts are hard to find for these motors, but I'll bet you could use a Merc coil (though it would require a bit of fabricating). I have a bunch of them if you want to try one. PM me with your address.
Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell