Idea & Info: The Exorcist (Original Theatrical Release) — Page 5

There are two fanedit versions I know of, one is a proper 35mm scan here;

The Exorcist & The Shining Blu-Ray
https://bookofthedead.ws/online_portfolio/35mm_scans/br_the_exorcist-the_shining_blu-ray.html

The other is a Blu-Ray regrade project, which is on MS (for those who have access to that)