Here's a look at the new FotoDiox Shark Camera Cage for the Sony A7R II or Sony A7s II cameras. It's more of a half-cage style rig with a wooden side handle. It is available in two color finishes - Samurai Silver and Pitch Black.
One thing to note is that this cage design blocks access to the Sony Multi-function hotshoe just in case you're working with the Sony XLR adapter (seen here). The Shark Cage comes with a Top Handle, 15mm Base, (2) 15mm Aluminum Rods, locks for HDMI and audio cables, and enough room to support various lens adapters.
Besides the Sony A7sII and Sony A7RII, the new FotoDiox SharkCage designs are also available for the Panasonic GH4 and Samsung NX1 cameras (here)