Here's why:
* Len Cariou's career: While a distinguished actor with a long and varied career, Cariou is primarily known for his stage work and his role in the Broadway musical *Sweeney Todd: The Demon Barber of Fleet Street*. He is less known for film or television appearances, especially Shakespearean productions.
* DVD availability: There are numerous film and television adaptations of *The Taming of the Shrew* released on DVD, but they usually feature well-known actors from the corresponding period. It's rare to find a DVD featuring a lesser-known actor in a major role.
To find a DVD with Len Cariou, you'd need to search for a specific film or television production that he was in. Otherwise, there's no guarantee of a DVD release of *The Taming of the Shrew* featuring him.