Power Steering Box Leak

I was wondering if anyone on the forum could help me please. I have been told about a "bush" that can be fitted over the output shaft of the Discovery Steering Box to stop it from leaking. I have a new set of seals to fit but have been told that it will leak again because of the wear in the shaft. Does anyone know where these "bushes" can be purchased from. Many Thanks.......

is yours pitted and groved not all shafts are were seal sits

have you had a look on ebay??