Here is something I saw over in Practical Machinist. A vise jaw system for holding multiple parts.
=========================================================================== Every time you replace a part in the vise, each time you change a tool...you've spent valuable time. By using our Multi-Kwik Jaws you now "eliminate repetitious part changing, tool changing, and the need to clean the vise after every single part". Load as many parts as you can fit into the vise and do each operation to all of the parts at the same time. Multi-Kwik Jaw allows quick, versatile, re-usable set-ups.