The ladder on the back of my 2009 Cobalt 296 will not stay up. I just purchased the boat from an individual so it came missing the "clip" to keep it in place. Does anyone know how or where to get the replacement piece? If not, I will need to replace the entire ladder. If I have to drill new holes in the swim platform is it just made of fiberglass or is there another material inside that the fiberglass surrounds?