Well if it's part number 19 in the diagram that you're after then the Saab part number is 91 45 897. Email Elkparts in the Saab parts link and they'll give you a quote (or phone your local dealer to compare).
91 45 897 Is a turbo coolant pipe that runs from the turbo (TD04) under the car to the water pump. It is about £25 from Main Dealer or Elkparts (Inc. shipping). The other coolant pipe comes down from the throttle body, I think it is 91 37 944 and that is well over £50 from Main Dealer.