I used to use a Zing brand one on my Olympus. Fit perfectly. However with my Sony, the eyepiece is different and I have a different lens. I couldn't find one that worked for me so I opted for a Lowepro bag (I always carry a backpack to Disney except on days when we go back to the room & then to fancy dinners.)
Suggest you measure, measure, measure before buying a case though as some people will say it fits well in the reviews, but really it just depends on your set up.