I think you *might* be able look them up by vehicle compatibility and may be able to reverse engineer that if you are trying to trailer it (not sure if that is what you mean). Certainly you can look them up by length. I got mine as an open box on Amazon IIRC for next to nothing. That said I think a lot of the clips/straps are intended to work with a truck bed so I have my doubts it would function on any kind of a trailer except one with sides that approximate the height of a truck bed if that is what you are doing. At any rate, for vehicle purchases you can either look up specific compatibility or read reviews, usually there is enough of them to discern if it will or won't for your specific truck.