Dennis, I have spoken with a number of magneto repairers here and in the UK. Surprisingly only two had heard of an induction coil connected to a magneto. One said his father used to make them some 30 years ago, and if I could supply him with one he could copy it, but he would have to dismantle it first, which would make the original useless.
My second to last resort is to try to connect a normal coil and condenser to the points and use the distrbutor of the magneto. I have to ground the magneto.
My very last resort is to replace the magneto.