The best one (available) is Chevysrule's model, that I further edited. The one issue with it Is I bulged out the teardrop shapes behind the visor way too much, it was due to a perspective issue in pep designer. I plan on fixing it sometime, but I'm pretty busy. The shape is about as accurate as you can get, though it couls stand for some more detail. I might get it back into blender and so some more work.