Mount Zoom, the component brand with a penchant for extremely light components that don't break the bank, have released their widest ever handlebar, the Lightweight Low Riser XL at 740mm. Yet it weighs just 165g.
Made from uni-directional carbon fibre with trim marks to cut to taste, if it's too wide for you. Rise is 20mm and it has a 9 degree back sweep and 4.5 degree up sweep.
There's no rider weight limit which is impressive. It costs £72.99 and is available now from http://mtzoom.com