Searching for compatible carrying case for an extended battery/back cover on a Galaxy S4.


I’ve recently added an extended battery/back cover to my new Samsung Galaxy S4 (SGH-1337), slightly widening the phone and was wondering if there is a compatible carrying case “shock proof case” etc. for sale. Searching online, I really don't know the more precise descriptive terms are. Any recommendations soon would be greatly appreciated! The phone will be fully functional this next month and I need to feel secure taking it with me.