Tim,
If you're going to hunt down either of the two Premier passenger or either of the two Rail King passenger sets, start now and good luck. It took me the better part of three years to put together one set of RK four cars and the two car add-on. MTH doesn't seem to make alot of the NYO&W items when they do make them. I passed on the MTH Premier Camelback a few years back and still regret it.