1. Official Soundtrack Release: Check if there is an official soundtrack album released for the movie. Sometimes, movie soundtracks are released as albums that you can purchase or stream.
2. Streaming Services: Some streaming services may offer the original score as part of their music library. Look for platforms that have the movie's soundtrack available for streaming.
3. Digital Music Stores: Online music stores such as iTunes, Amazon Music, and Google Play Music often sell individual songs or entire soundtracks from movies. Search for the "Once Upon a Time in America" soundtrack on these platforms.
4. Physical Media: If you prefer physical media, you may find the original score on CDs or vinyl records at music stores or online retailers.
5. Composer's Website: The composer who created the original score may have their own website where they offer their music for purchase or streaming.
6. Movie Production Company: In some cases, movie production companies may release the original score separately. Check the production company's website or social media channels for information on obtaining the score.
7. Online Music Communities: Look for online music communities or forums where users share music and information. Someone in these communities may have a copy of the score or be able to point you in the right direction.
Remember to respect copyright laws and ensure that you are obtaining the original score from legitimate sources.