How about one of these....

http://www.hellskitchen.it/index.php?mode=collezioni&ID_cat=3

I am informed that they are made using recycled materials, but are perfectly safe street legal.
They look a bit less like a usual motorcycle helmet, but will do the same job.
It's Italian so it must be bang on in fashion terms.

Just a thought..

Jaguar F-Type V6s roadster
2009 Harley Davidson XR1200
1986 Honda VFR750F (RC24)