Sikorsky’s S-60 “Flying Crane” prototype still survives, despite suffering a major accident in 1961. Thankfully, someone cared enough to save the wreckage, and it's in the 12th year of restoration

https://warbirdsnews.com/aviation-museum-news/sikorsky-s-60-flying-crane-prototype-restoration-update-august-2022.html

https://www.ctairandspace.org/s-60