Man, I'm in the same boat as you.
I've been looking forever.
The best one I've found is this: http://www.amazon.com/UL80Vt-A1-14-Inch-Light-Laptop-Battery/dp/B002Q8HK7K/ref=cm_cr_pr_product_top
It has mediocre stats but is very cheap and has amazing battery life at around 11 hours. From...