Jason, I believe that there is a segment of a postcard set, released in 1998, featuring the cutaway model. The postcards were issued by the LA Maritime Museum, and the segment features part of the interiors for the cutaway models.
BTW, there is also a postcard of the Lusitania model, as well.
Thanks! That's a start anyway. There are some pictures also in Titanic Commutator, the Lusitania special edition, and that's what sparked my interest. The detail is remarkable - I particularly liked the 3rd class