http://www.amazon.com/RuggedFusion-Protective-Extended-INCLUDED-GT-i9300/dp/B00BZGQ854

This is the only case I've found that will "fit" without modding. I had to put fit into quotes, because it barely does it. The rubber underneath part fits perfectly, but the plastic outer shell barely fits. It is tight, but you can tell that if it was any more tighter, the plastic wouldn't fit. If you are anal about how your case fits, this might bug the hell out of you... Due to there being a small gap at the bottom end of the case because of the plastic case being just .5 to 1mm shy of a perfect fit, in which you can see how the case should fit perfectly, but due to it being so tight with this battery, there is the smallest gap on the bottom where the fitting line is between rubber and plastic. ( sorry, this is hard for me to describe and I can't take a pick of it due to my phone being my camera and you can only see how it barely fits when its actually on the camera.) Apparently they say if it doesn't fit , to email them and they will try and help, but it's been 4 days since I sent in my email and haven't received a response back. I'll give them 1 more day, send another email, and if no reply after that, I'll just post a negative review on Amazon due to their lack of communication. The case itself is very nice though, and makes your phone feel very sturdy and strong. The outer plastic is a tad slick, so you might want to do something to add a tad bit more grip to it.