Apr 3, 2023
UHD BD quality download on Kaleidescape, a whopping 86.8 GB
https://www.hometheaterforum.com/community/threads/once-upon-a-time-in-the-west-4k-uhd.378948/page-4

Review of UHD - May 8, 2023
PICTURE | The 4K HDR release of the revered Leone epic looks gorgeous but is a little too clean, removing the necessary grit, resulting in a look that’s untrue to the original film

SOUND | Crisp and clean while staying true to the soundtrack—but, once again, where’s the original mono mix?

With the link to Kaleidescape.
https://www.cineluxe.com/review-once-upon-a-time-in-the-west/