hi, have you isolated problem to actual ignition coil itself?
As in swapped coils between sides and have problem move with coil to other side?
Most of times, it's wiring issues that cause ignition issues.
1. If it indeed is coil issue, you can use any variety of inductive coils. From pretty much any bike, or even auto coils such as Accel or MSD.
2. can convert to COP using CBR600RR coils. Be sure to get units of similar primary-impedance of stock coils 2.2-3.5 ohms. Or add ballast resistors. Want current draw around 0.5-0.6a.
https://www.ninjette.org/forums/showthread.php?t=123425
3. I've got some pre-gen coils I can send you for cost of shipping.