You can find them in local libraries. There are often collections of regional ghost stories that don't involve UFOs. Old books with local folklore and superstitions can be a great source. Also, some small - town historical societies might have records or tales passed down through generations that are just about ghosts and not UFOs.
You could start by asking the elderly in your community. They usually know a lot of traditional ghost stories that have been passed down in the family or neighborhood. These stories are likely to be free of UFO elements as they come from a time when UFOs were not as much of a cultural concept. Another option is to look for podcasts that focus specifically on ghost stories. Many of these podcasts feature stories that are just about the supernatural in the form of ghosts and not related to extraterrestrial phenomena.