Hello John,
you´re right - the ITALERI website is doing its best to make things complicated. Although Rufe already mentioned the two part numbers (that´s why I included them in my scans) here is the way through the website
--- Italeri homepage
--- 02 products
--- Historics 1:72
--- the last two items at the end of the list
Interesting is, that both kits are still "announced" and have just a provisory description, when I looked on the website a few minutes ago. It seems, that they´re not up to date ...
Another nice detail of the kits is, that the first floor has a real flooring so that the "extreme modellers" can add walls, doors, furniture and loads of other details under the detachable roof.