You could easily make that. I'd go 66"t/t, 1 1/2" at the fades and out 6" to 8" and a straight taper ti 1/2" tips(for now). If you find the limbs getting too thin begin reducing the width by removing wood(scraping) on both sides. I would make a symmetrical bow with the center of the handle in the center of the bow, a 4" handle(centered) and 1 1/2" to 2" fades.
Where is that knot located? Will you post a pic of the entire back. This would be for a 28" draw length.