For brakes you could use calipers, as used on cyclo-cross. These will mount on the V-brake bosses but their pull matches brifters'.
thanks, centerpull cantis will do the trick. I should have thought of that.
and yes, there are 451 out there but no studded I could find. and I've had bad luck with primo comets (flats, bulges). love my marathons and marathon winters but they are 406 only