In reply to lippy lion: I also have duck feet - wide forefoot and narrow heel.
I used to use Nepal Extremes, which were too wide in the heel and too narrow in the forefoot.
I then tried the new version of the NEpal Extremes (Nepal EVO) at an ice festival. they have a narrower heel and worked better for me, but to get enough width in the forefoot I still had to size up a lot.
Next I tried Cumbres, reportedly the widest B3 boots you can get. Perfect in the forefoot, slightly wide in the heel, which i sorted out with a custom footbed (Superfeet would do the trick too, I guess). Didn't have to take them as big as NEpal EVOs/Extremes. I use Cumbres now and am very happy. They fit me, and on top of that they're superbly well constructed: very assymetric, thicker leather than Nepal Extremes, no Goretex. If they fit, there's no better option.