First of all, what’s “ancient”? As in “Ancient Greece”? Assuming you meant “historical” instead:

People do. Not companies. Why do you think a Stradivari violin is called that? Because Stradivari built it (with some help no doubt). So if you want an instrument like that, it stands to reason that you use the same process.

I just learned from another comment that these people are called luthiers in English. Some still exist.