Tektro R559 are modern dual pivots that are long enough and come in a nutted version. For something vintage, a Weinmann or Dia-Compe 750 centerpull brakes will be stronger than single pivot brakes, but require cable hangers.

You can get “nutted” versions of many dual-pivot center-mount calipers for pre-recessed-nut framesets.

If you’re good with tools, drilling the back half of the fork crown to clear the shank of a recessed nut is an easy and worthwhile task if you’re wanting to open up your options for the more important of the two calipers and/or use a Sheldon Nut for fenders.