SJS perhaps?I was going to say the minoura accessory bar. Mines just falen to pieces after about 4 years.
If there is alot to get on the bars I did see one alternative - so long as theres plenty of spacers under the stem.
A second angled stem, angled downward and a section of handlebar. Lights etc can go on this.
Spotted it on a site about touring bikes, along with some weird handlebars alternatives
When you spend out for lots of handlebar accessories you need to factor in the cost of mounting them all.Some (most) of those look a bit steep for my pocket