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Luckily, there are a collection of stories that have been around for hundreds of years, but don't seem to get much attention from filmmakers. These stories are ancient Buddhist tales - known as Jataka tales - and are very much like Aesop's Fables and Christian biblical parables, but with various morals that emphasize Buddhist concepts such as compassion, patience, and honesty.
Jataka Tales - Volume I
Jataka Tales - Volume II
Take some time and check them out and you just might find one that closely resembles the very story you're working on, possibly moving into a direction you hadn't considered. Or maybe you'll find a story to give you the spark for a new script.
Either way, Tashi Delek! ("good luck" in Tibetan)