Dear Nick
My friend has returned to the UK and has lent me a June 2003 BEC spares list. The club has a vast array of spares including Ignition coils, Contact breakers, Siba Condenser and points backplate for the Excelsior engine.
My friend thinks he may have some old coils, but knows nothing about a replacement electronic ignition system, but the BEC should be able to help him.
If your friend is able to join the owners club, they should be able to solve all his needs.
Chris Thomas