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.