The Little Drummer Boy, Book II (1976)
In 1976, Rankin/Bass made a sequel to The Little Drummer Boy. They subtitled it "Book II" in a biblical style reference.
The story follows Aaron right after the birth of Christ as he helps one of the wise men, Melchior, recover silver bells that were cast to ring at the birth of the Messiah. The bells were stolen by greedy Roman soldiers.
This is a very good sequel and it features a version of the 1963 Bing Crosby Christmas song, "Do You Hear What I Hear?".
Here is a number from the show