Here's a short product overview shared with us by HDSLRnow for a set of highly adjustable rig handles. The handles can accept both 15mm and 19mm rails.
For more of these quick tips, follow HDSLRnow via Twitter. As far as the product goes, in the video I noticed the rails use a blue accent, but in the actual listing it shows all parts are accented in Red. Priced just under $200 dollars and found via ebay (here).
15mm / 19mm Adjustable Rig Handles