Surefire Flashlights

I bought and E2e last year, and I gotta say, its the brightest little flashlight I have ever seen....Well made too. Anyone else have one?
 
The only problem is the batteries. I typically get little more than an hour out of the 123A lithuims. This wouldnt be a huge problem except they typically cost nearly $5 each at times.
 
Anyone know where to get the 123A batteries cheap?