Just use a Tektro power hanger from SJS Cycles, they're much more robust and improve brake performance no end. You can also use them on the rear for frames without a canti' hanger. You can also find a Tektro brake booster on ebay, in a choice of colours, with a built-in power hanger...
...the reason people took off the Kona hanger, other than to fit V's, was because they were rubbish!
Front hanger on the 'Kili Wot in my sig. is a Tektro from SJS