Sent a LOR, SASE and an index card to the data base address on May 28 2017. On Aug 15 2017 I received a different index card signed by John Williams. Thank you Mr. Williams.
Address used
John Williams
333 Loring Avenue
Los Angeles, CA 90024-2640
USA
Nice success! Rather fast too! I've seen some take 6 months. I mailed mine out July 11th, still waiting for a reply. I'm surprised it wasn't the index card with a picture of him too though like others have gotten.