Those magazines are quite scarce and only offered for a year or two. It ended up making more sense for S&W to make them 50-State legal.
They are not easily found, they go for quite a premium.
As for shipping a magazine to Italy...? I suspect that it a whole ball of wax that is not so simple.
With all that said...
DO YOU KNOW ANYONE WITH A 3D PRINTER...? And if you don't, you can find newly made 3D printed followers that would allow you to take the 10-round magazines and set them up like a pre-1994 12-round magazine. I have seen them on Ebay.