Perhaps the 4800 I bought is no longer available. I do agree it can be hard to find items online with Tweety's. I have called them several times and always received an immediate expert opinion. Prices on many items seem to be fixed by the manufacturer. That could be the case with Lippert. That happened when I bought Timbrens and also Torqlift tiedowns from them. They were able to give me information on the correct part numbers and also shipped immediately so I had the items within a couple of days. There could be equivalent or better choices than Tweety's. I do know they are much, much better than the big guy.