The Singing Nun Story

I know about the Debbie Reynolds version and the French version but why hasn't there been an English language version. I mean the real story. The clips I've seen of Sister Smile look great (like her imitating Elvis in a class full of children) but it's hard to find. I do remember how popular her song was just after the JFK murder and just before the birth of Beatlemania. Is the true tragic story being suppressed by the Catholic church?