Hi if it is your rack input seal like mine was finding a used rack is hard i couldnt find one anyway. The recon rack i got from acs power steering was the correct one it arrived the next day and is still working with no leaks. Think it was £260 in the end compared to 1k for a new one from citroen id say it was a bargain. Easiest way to see for definate of the input seal is leaking is to remove the cover in the foot well and have a look. You can grope around through the wheel well but if its as bad as mine was the fluid is allover the the shop.