What sort of router are you using for this? Does it have a 4th axis? Without that, you'll have difficulty reaching all the surfaces you've modeled with your tool, if you try to cut it in one piece. In most woods, this part won't have much strength, unless you start by bending the blank on a half-cylindrical form. Gluing it up from two or more pieces would help with that, if you can devise joints that are strong enough to hold them together.