My dad is thinking of getting the Galaxy S4 Active. Are there any good cases for the Active? Can you use cases for the 'regular' S4 with the Active? I know screen protectors will probably need to be phone specific, but I didn't know about cases. In my quick search of Amazon, I didn't find many for the Active. I have the regular S4, but I'm pretty clueless when it comes to this version. Thanks for any insight you can provide.