Well, that will be a lot of fun to model - I'd challenge you to a race but I know who would win
How closely do you want to match the container? I rifled through my stash of various containers, and the Deluxe containers are of a newer prototype and will be too high, whereas the Arnold ones are closer in height but the ribs are too shallow, especially on the ends (I've not seen the Fine N Scale ones in person so can't comment on those).
The closest match I could find for the ribbing is the Walthers ribbed 40' high-cube... so, if you feel like doing some cutting and splicing, here's an idea: buy a couple and cut them down to size - as lock4244 mentioned, you'd need to rebuild the bootom edges anyway, and this would also give you some material to make the correct doors (I notice MBK are selling
Itel and
K-line schemes for half price).