subfixer I just came across you're post.
Head light covers were issued with the vehicle, they were carried under the right seat with the windshield cover.
I've seen a lot of photos with bare head lights , British covers, some with the canvas covers, some with a coat of O.D. paint and one photo with one bare headlight and the other one covered or painted over.
It's like gas mask's they were issued but how many photo's do you see with G.I.'s carrying them.
Dave