Where to buy The Trap?

Hi
I am a headmaster and teacher of philosophy of Fana Folkehogskule (a Norwegian Folk High School in Bergen, Norway) and very much want to to buy a copy of the three programs named:
The Trap – What Happened To Our Dream Of Freedom?
The programs was sent on BBC 2 (?) some years ago. I cannot find anything on BBC's homepages that leads me to something like a podcast-like "store" or a shop where old programs could be purchased. There is nothing to find on play.com or sendit.com either.


Please......
A Happy New Year from
Dagfinn Eggen