You can try it online. We found Some Children See Him - James Taylor For Solo, Piano and Strings at Store.payloadz.com at $59.99.
We also found matches at Sheetmusicplus.com, wherein "Some Children See Him" is included in the song list like The Christmas Family Songbook (at page 234.) ($34.99) however it’s not showing if it's James Taylor's version.
"Some Children See Him" was composed by Alfred Burt an American jazz musician who wrote between 1942 and 1954 an annual Christmas carol with an old family friend, Wilha Hutson.
James Taylor recorded the carol for his James Taylor: A Christmas Album, which was released on a limited-edition basis in 2004, with distribution through Hallmark Cards and re-issued two years later by Columbia.
How many times have you seen someone sit down and play music you know they’ve never seen before and play it beautifully? Doesn’t it make you wish you could do that too? Well, the good news is that you can, but it might take a little bit of work. Check out some tips for improving sight reading at Sheetmusicplus.com.