Don't try bending it back. The levers are made to snap if they're bent too far, to protect the master cylinder from damage.
I've seen inexpensive OEM knockoff levers on ebay (~$30-40), so you might wanna try that. Also, they guys at Motowheels are very helpful, and could probably hook you up w/what you need...
I did the same thing you did when I first got my bike, and ended up overpaying for a replacement lever
($100
)
-Fortunately it's easy to install a replacement, provided you didn't bend the connector which attaches the lever to the master cylinder, which is a pregnant dog to replace from what I've heard!!