I need something that can be bent into an arc with approx 5-inch radius. I'm thinking something plastic but could be another material. I need to be able to bend this myself without spending more on tools jigs etc to make the bend. In other words it can't be steel or other metal that can not be bent by hand. The arc, once it is shaped, will have both ends secured to the ends of a plate on top of which will sit an approximate ten pound camera. The finished piece will look like a capital "D" lying on its rounded side.