I'm looking for a good Master Cylinder

[George]

Bernie:     Insofar as an overhaul kit for the '91 200 brake master cylinder
has never been available, and many of us face having to deal with the issue,
it would be helpful if you could provide some pointers as to parts required,
sources and the process. The master cylinder in my '91 20 valve has never
been overhauled or replaced and at 312,000 miles I gotta believe it is
overdue........

Many thanks

George Sidman