I am restoring a 1981 Lemans CX100. I am trying to source a new headlight which is a sealed beam unit. I have all of the mounting hardware (shown in photo) but the light itself was broken. I have been told that I can possibly try an automotive unit. If anyone has any guidance it would be very helpful. I have checked with all of the traditional sources, (MG, Harpers, Cycle Garden, Mark Etheridge, Greg Bender)