Hello guys. Came across this after my S1 started dropping power steering fluid on my garage floor as well. Thought I might have to go down the upgrade route but my local dealer Revolutions in Perth found the original distributors for the S1 pumps who said they could refurbish it no problems. Was only away a few days and back to them looking like new with no leaks.
No idea of cost etc as mine was done for free as only recently purchased but might be worth trying to contact Russell, Elliot or Angus who I dealt with at Revolutions if all else fails.
