I have an aluminum master that I could not trace beyond the manufacturer. Order a Chinese replacement and in came a cast iron one. The internal seals matched so I swapped those and it works great. I kept the original seals in case but flip, everything is made in China these days.
The TR6 guys used to get pissed when I told them they had Chinese TR6's because all the replacement parts came from China and were total junk. It was so bad I gave up on it.
Don't tell me the Chinese are making Ferrari parts.