I've been keeping my eyes open for the headlight mounting bracket that bolts to the front of the fork plate on this bike. I know what it is, just couldn't locate one so I decided to make one instead.
I found some 1" square steel and cut it to a size that will work with the headlight assembly that I have. Drilled and tapped the rear and drilled across to mount it to the headlight. I needed to make the front rounded like the original so I used the tapped end and put a bolt with the head cut off and chucked it up in the drill press. I next used a flap disk with the drill running to get that nice even radius.
Next is to zinc plate the thing and problem solved!