The bed on my truck doesnt have the stock rails (lip) anymore so the sides are flush. I need to get a tonneau cover on it asap but i dont know how. does anybody have any thoughts on a cheap and easy way of getting some kind of cover on it? I cant just go buy one because they are all clamp on style and as said before i have nothing to clamp to. here is a half decent picture i hope someone can help me out. thanks in advance.