I have not found one after some very extensive searching and it would actually have to be by model and manu, since manus alter their lines somewhat. This is why it is oft recommended to try on ALL the helmets that a shop has. The cheapest one may fit you best.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
Identity theft is not Fun