Just wanted to let you know , you don't need that valve. I struggled over this and locating one , there are at least three that look similar but have the mounting holes and threaded hole for the line reversed. then there is a small one , and the large one that you usually see.
If you just rebend , change the line nut & reflare that short line to go from the metering block to the master and leave this valve out , the brakes will work the same and work fine.
I done my car this way (also some cars came with disks , but without this valve , so it's not mandatory) and the brakes are fantastic.
Just to let you know where I'm coming from , I used to work and manage two Midas shops and have done & bled literally over a 1000 brake jobs , so I know what a correct pedal feels like. There's no degradation to the system by not having this valve.
Let me know if you want a pic of my master & metering block area.