Hi Grant
Try
http://vehiclesofvictory.com/ Bob and I have found some strange parts there like CMP brake boosters (I think we bought the only ones they had).
Steve Kieth who reads MLU from time to time is also known as Doctor Duce, so if you're reading Steve any thoughts on rebuild kits.
Cheers Phil
Cheers Phil
PS---- Just visited the Vehicles of Victory web page, their catalog doesn't list rebuild kits but it does look like they will rebuild and sleeve the master cylinder.
They have also done a lot of work on their web site, has some interesting resources for Chevy parts.