I am looking for an n/s headlight but they are hard to find, I think you can buy one from www.franzose.de but you have to adjust them to suit the British roads, Malcolm wrote a bit about how this was done a while back.
billy
I have a Cibie Headlight as a leftover.
It has the concave glass.
As long as you can live with a little staining on the outer rim of the reflector I can send it to you for just the postage.
I can provide you with pics if you are intersted...