Mattyweb, I can almost guarentee you will need the little boomerang shaped window sub-corners and you may need the parts below them as well. The part that attaches the sub-corner to the package tray, I'll repost the pic with the layers of parts that make up these corners. No repops for this one yet, so you may have to fab something up. I may have an extra set, but I won't know for a while.