With the risk of sounding like I'm bragging, I scored a NOS 70 1970 brake booster, and an NOS 1970 power brake e-body master cylinder. The NOS booster was $550, came completely rebuilt, and the NOS M/C was $150. The date code on the M/C is 293rd day of 1969 which is perfect for my T/A project. I bought the parts from a well known supplier and rebuilder in the hobby. It was quite refreshing to deal with a vendor that made these available to me at a fair price. I'm so happy today, it almost feels like I won the lottery. The wife doesn't get it, but I wanted to share. Thanks Mr. Dewey!