Psycho Legacy Collection (Psycho Uncut + II + III + IV + Bates Motel (1987) + Remake) The uncensored (30 seconds longer) version known for being shown on German TV will be released for home video, unfortunately only as part of a large, pricier boxset. Suppose to be viewable in regions ABC. Discussion about the release here: https://forum.blu-ray.com/showthread.php?t=311618
Reading that second link reveals after all these years why the great book HITCHCOCK/TRUFFAUT contains a frame/illustration of Marion undressing which wasn't in the movie we all saw stateside.
UK, 4 DVD boxset has Bates stabbing Arbogast at the bottom of the stairs - Marion undressing more & bloody hands. Can't remember the other movies had cuts there not memorable viewing too me I don't like them much.