Looking for a Mopar 3420967 Master Cylinder Kit for Project

[Dragon Slayer]

I am looking to either purchase, or if you not selling it, gather information from the pistons on a NOS 3420967 kit. This was the repair kit for the Bendix 1970 B Body cars (Non Hemi) with Disc front brakes. I am building a reference document on Brake Kits. Thanks