There is a guy in Austrailia that makes the bulb your looking for. As I understand it they are modern halogen bulbs with the correct base to fit the headlight an it seems like somebody told me they are around $25 a pair. I book marked the web page on my computer at home. If you do a search for vintage bulb you will probably find him. I was going to buy a pair and them I ran across four original type at a swap meet for $4 so I bought them.



Have you considered a gell cell battery which is very small and can be mounted in any position to power your other lights? You could charge this from the mag with a diode in between also.