Raised handlebars for V7 II - any suggestions?

I woud like to raise the handlebars on my V7 II by a couple of inches. I have tried risers, but found they allowed the bars to twist too easily. Has anyone found a good handlebar that would do this job? (ps renthal ones seem to be too narrow across the central straight part of the bar).

Check you have the cable, wiring and hose lengths before you start.