Hi
I am using motorcycle high voltage coil in my CDI.
I am buying new one but also have used from my motorcycle repair shop. When I take one used I check with the CDI and they work.
Check coils from small mopeds, I have mine from Honda 600 off road bike ( I believe the model is XT600, other model is Honda Transalp).
I have coils with cable screwed in the coil and other model with cable melted from factory , this type is bad when you need replace the cable.
Good luck
Jose