@Mellow Hudson Mike posted:John,
Here's what I've found. I think you're correct about the website. I first saw them in a K-Line catalog that I picked up at a show a couple years back:
Pennsylvania Pass Car, Streamlined Observation K4680-38424 1999 18" Spirit of St. Louis, 'Alexander Johnston Cassatt' (Black/Gold Box) Aluminum #8424 Pennsylvania Pass Car, Streamlined Pullman K4680-38060 1999 18" Spirit of St. Louis, 'City of Reading' (Black/Gold Box) Aluminum #8060
You may want to check these though; they may already be in your 4-pack set.Mike
Update:
The above are indeed part of the 4-Car set. My mistake.
A little more digging however did get me to two additional 2-Car 18" sets:
1.) K-Line K-4680S -- 2-Car Set (Catalogued 2004)
K4680-30009 Pullman "Cabin Creek"
K4680-33600 Coach #3600
2.) K-Line K-4680T -- 2-Car Set (Catalogued 2004)
K4680-34234 RPO #4234
K4680-30011 Pullman "Tippecanoe Rapids"
I'd like to add these to my collection as well, sometime in the future hopefully.
Mike