Got my F15A's headlights working for the Normandy trip, but am planning to replace them with new headlamps with 6V H4 Halogen bulbs.
As shown by Phil Waterman, they produce a much better light pattern.
As far as I can tell, Ford uses a system which is found on many British cars - or at least mine does after it was restored in the UK. Not sure if this is the original set-up, but I am posting some links to parts stores here for anyone looking to retrofit their CMPs with a more modern setup.
HTH,
Hanno