You may not realize that you are opening a can of worms here. Most domestic suppliers will never reveal who they by from, and for many reasons. My suppliers often do the same, telling me it's simply a genuine "insert brand name".
As things are, often, even people in China and Tawian we speak with over there have no idea where some items that are brought in domestically are made at, specifically. They are not being elusive, but have so many copies of copies over there, nobody knows what everybody is doing definitivly.
I've always felt that people who are reputable and selling quailty products would be proud of their production facilitys, to the point of offering tours, like a Ben and Jerrys ice cream. This is not todays reality for again, many reasons Idon't want to get into on an internet message board.
If you are looking for a good servo motor, the one I sell lists the factory, and can be seen here; Motor proudly made in China by Zhejiang Lishui Tianning Motor Co.,Ltd