The 737 fuselages are shipped out of Wichita to Seattle. No one makes the cars or the proper scale (at least proper for HO) airplane. A friend of mine works at Spirit, used to be part of Boeing and has a nice model of the cars and fuselage. Of course being part of the team that did that didn't hurt and he got to ride along with BN from KS to WA!
Ricky
More information, photos, and modeling info here: http://people.ucalgary.ca/~keay/planedoc.html
http://en.wikipedia.org/wiki/Flatcar#Aircraft_parts_flatcars
http://www.blwnscale.com/LBF%20Skybox.htm
Modifying flat cars, that is easy. Fuselages are a bit tougher, depending on what type of material you intend on using. Balsa is the easiest to cut, however is more prone to warpage and breaking. Sheet brass might be a better option, but cutting out windows is not as easy as it would be for balsa.
I have actually given doing something like that in TT scale some thought, as there are TT scale airliner kits available. It's doable, it will just take some effort to "look right".
So many scales, so many trains, so little time.....
I was in Tulsa, OK today, at a train show and I saw a club modular layout operating. I was following this train around this layout and the operator was having trouble with it stopping and starting. It was a manifest train and he had a unique car mixed in. It said Boeing on the side. I looked it up and found some pictures and found out it is an aircraft parts car. I didnt to ask the operator who made the car so I don't know who made it. It was HO scale.
Here is a link one of the pictures.
http://www.rrpicturearchives.net/showPicture.aspx?id=531442
I notice that Boeing transports fuselages of 737s(?) from somewhere to around Seattle. Anyway, how hard do you think it would be to make a few fuselages and modify 89' flats?
Will