I have found it necessary to replace the master cylinder on my '71 Midget due to it leaking. During the install I decide to inspect the rest of the system and found that a PO has removed the brake failure warning switch and plugged the hole with a bolt. This is not a big issue as they can be purchased at our wonderful host's store. The problem is that when I got the car there was a bag of small parts that I could not identify, but after seeing the valve it occurred to me that one of the parts was the innards of said valve. I pulled the valve apart and sure enough, the little piston is gone. Unfortunately, so is the little bag of parts. Does anyone know where I can get one of those valves, or at least the piston? I really don't want to run a dual system in single mode. Especially on a car this old. Any help or leads are greatly appreciated.
Norman