When was your target piece first published? In 2020, items published 1924 and earlier are in the public domain; in 2021, creations from 1925 enter the public domain, etc. Try to find it online as a digitized score.
Use Primo to find scores held in Hamersly Library and its regional partners (Summit). On your search results screen, use the Resource Type: Scores filter.
To search in libraries beyond Summit, use WorldCat with the Format: Musical Score filter. The same search tips apply as with Primo.