If interested, search for these terms. They are on 1337x and MySpleen.
STAR WARS 4K77 v1.4 No DNR 2160p 4KUHD BD-50
THE EMPIRE STRIKES BACK 4K80 v1.0 No DNR 2160p 4KUHD BD-50
RETURN OF THE JEDI 4K83 v1.3 Minimal DNR 2160p 4KUHD BD-50 ISO
All are ready to burn with ImgBurn or equivalent. They will play on any 4K player or compatible console.
I also made a 4K disc of Alien ³ - The Legacy Cut. Just search for this term on both 1337x and MySpleen.
Alien ³ - The Legacy Cut 4K BD-50