Dealextreme does a SSC P7 LED Bike Light Set

http://www.dealextreme.com/details.dx/sku.25149

Or I would use something like a Cree MC-E drop in on a cheap P60 compatible flashlight with a good flashlight handlebar mount and some 18650 Lithium ion cells and charger.

http://www.dealextreme.com/details.dx/sku.21037

http://www.dealextreme.com/details.dx/sku.16179

http://www.dealextreme.com/details.dx/sku.13004