By the radiologist’s description, “left lateral recess narrowing and disc contact on the descending left S1 nerve root”, it sounds like a redo surgery at this level could be helpful. I must remind you that radiologists can describe things differently than a spine surgeon so collaboration with a spine surgeon should be taken.
A selective nerve root block would be helpful to insure the root is the cause of your symptoms. See:
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.