I really love my C10, but I would really like a flat seat similar to the late 70’s sport bikes(Z1-R), which allowed more forward and aft movement of my butt, thereby allowing me to ride longer distances with less butt fatigue. The butt cup on my ‘03 C10 is too far forward. I have seen some earlier C10’s on eBay, and it appears some from the early 90’s-late 80’s may have had a less pronounced butt cup. Does anyone know where I can find a flat seat for the C10, or will I have to take mine to an upholstery shop?