Here's a beautifully modern-vintage skull saver to make you look all period correct. The N20 is made by Italian helmet manufacturer, Nolan. The design is reminiscent of fighter pilot helmets, with an aviator style, flip up shield, that is "optically correct" - (?, sounds legit.)
Not only are the inners removable and washable, but they're also anti-bacterial and anti-fungal. This is great news for those of you who, like my co-worker, have a medically diagnosed case of the sweaties.
The chin strap also has a quick release tension system built into it for quick ejection.
The N20 weighs in at 2.5lbs (XL), making it about .6lbs heavier then a Bell Custom 500. Expect your neck muscles to get a bit more of a work out while you're checking that bogie on your six.
It's DOT approved, and will run you about $170.00 through various Amazon stores.