Master Cylinder - 200Q20VTQ made of unobtanium?

[George]

Bernie:

My '91 200 Avant (312,000 miles) is still running the original brake master
cylinder, and I hope it continues forever. But, I occasionally watch for a
buy on a replacement, just in case. Everyone I check with tells me the MC on
this particular model cannot be rebuilt and there is no listed kit for a
rebuild. Do you have some special insight or sources on parts, etc.  ??

George Sidman