Where can I buy an iPhone 5 battery replacement kit?

My iPhone battery life does not last very long and I want to get a new battery. I don't want to take it to a store to do it for me I want to buy my own battery replacement kit and install the battery myself but where could I buy a battery Not online bug at a store

Have you know that you may qualify for a free replacement for your iPhone 5 battery from Apple? :
https://www.apple.com/...tries.html

Quite a few places online if you look:
http://www.directfix.com/product/IP-2674.html

http://www.amazon.com/...53yoye3x_b

This will show you how to replace your iPhone 5 battery:
https://www.ifixit.com/...ment/10587

Pretty cheap on ebay
http://www.ebay.com/...1232993087