Having been unavailable to order from amazon.it for the previous couple of weeks, it's now available again. Price EUR 16.23.
This is probably the best Steelbook version to get as it is confirmed to be a 2 Blu-ray disc set. Disc 1 contains both cuts of the film (Theatrical & Rogue), whilst Disc 2 contains the bonus material.
It would appear that the UK and French versions don't include the bonus disc, since neither listing mentions it.