Speak to
http://www.power-steering.co.uk/
They have new and reconditioned power steering gears for hundreds of cars and will either have your pipes in stock or will make them up and mail them. I've used them several times for my 960 and they are excellent.
Power Steering Services,
Unit 5 Brookmarsh Industrial Estate, 70 Norman Road, Greenwich, London SE10 9QE. 0208 853 3343