I've stumbled upon a few places where you might find 'The Birth of Jesus, A Short Story Based on Luke Chapter Two' without spending a dime. Project Gutenberg is a fantastic resource for classic texts, including religious writings—though I’m not entirely sure if this specific adaptation is there. Worth a look, though! Another spot is Open Library, which often has lesser-known works available for borrowing digitally.
If you’re open to audio versions, Librivox might have a narrated version, as they specialize in public domain recordings. Sometimes, smaller Christian literature sites or blogs share such stories, so a quick Google search with the title in quotes could turn up hidden gems. Just be cautious about sketchy sites—always check reviews or community feedback before downloading anything.