Your best bet is to find the italian dub of ANY rip/copy of the film(s) you’re looking for and then paste it to the 4K video with Vegas Pro or similar.

Check icv-crew (il corsaro verde) or just go on 1337x and search “4k ita” or “1440p ita”, there are lots of films.

There are no italian private trackers, only releasears that operate through forums. Your best bet for 4k content is ildragonenero even though the encodes are very compressed.

I’ll be straightforward with you: pirating in italian is a work of love and endurance. Protect yourself using a vpn, learn how to remux tracks (because not everything is available) and lurk around communities. They are very scattered but they are there