Are you looking for 6 or 12 volt bulbs?
The 12 volt halogen ones should be available from a decent auto electrician, the 6 volt halogen ones are a little harder to come by. I found a guy in Adelade that stocks them and will post them to you...I will try to find his web site.....
ahhhh, here it is:
http://www.classicandvintagebulbs.com/index.html
The non-halogen style bulbs in both 6 and 12 volt should also be available from a good parts supplier or auto electrician.
R
🙂
PS: I'm running 6 volt halogen bulbs in my '63 - I have changed the wiring slightly so that the headlight switch triggers a relay (which take the full current of the headlights rather than the switch). The light from the headlights on my '63 is now on a par with the light from the headlights on my late model Jap company car! Don't let anyone tell you that 6 volt headlights are no good!