I got mine from gdcdirect a few weeks ago. I don't think its OEM, but it works pretty well.
http://www.ebay.com/itm/261431163466
Here's a screenshot of my battery life from today. On track for about 4.5 hours of screen on time, which was close (maybe slightly less) to what I got with the original battery before it started degrading.
I originally bought this one from amazon and it was trash so I returned it.
http://www.amazon.com/gp/product/B00X6V5G6S?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00
