So here is a few pictures. Got the 6.5' bed, 4 of the tie down things. looks to be in pretty good shape. Few minor scuffs on the one that goes behind the cab...looks like previous owner musta had a dirt bike or something.
I bet it still works on a long bed. It might be a bit short but that shouldn't matter. It's only a matter of making sure the holes in the rails line up with the holes in the bed. If they don't, drill some new holes in the rails and you should be good to go.