On Fri, 22 Mar 2013 17:10:07 -0400, Bob Engelhardt
wrote:

On 3/21/2013 11:38 PM, wrote:
I have a 4" drill press vice. The moveable jaw has 2 semi circular
jaws (the diameter being half the vice width) that pivot to clamp any
odd shaped piece. It works really well on round items. I would like to
buy another but don't know what to search for.

Like this?
http://www.quietelectronics.com/Alas...-S110175A.aspx

Yep, that's it. I've used the heck out of this.