Become a Full Member and get the official Linkage Tour and the official Starting Aid. This information alone will pay for your membership
I'd buy new. I paid something like 150 euros for OEM a few years ago.
Must have been several times a "few years ago" for that price. Send the MC to Apple Hydraulics, Calverton, NY, for a prompt and reasonable rebuild. http://applehydraulicsonline.com/