If you have a brown hackle cape or saddle feathers just strip one of them. If the color suits then soak the stems a little in warm water prior to tying them in. the soak makes them very flexible and I always liked the segmented affect better than peacock. They are also tougher than stripped peacock, for a real tough body, coat the wrapped quill with some tying cement before continuing with the rest. That will keep the quill body together through a lot of sharp little teeth.
PS. You may find that a medium blue dunn will make some great body color quills also, experiment