I have a client that makes parts for people in China. You give them drawings, or a part to copy, and specify things like what it should be made from, how it should be coated etc.
You can also spec a cycles before falure if you want them to do a random test to falure on the parts. (More money)
They have all sorts of aluminum and stamped parts made.
I can get just about any metal or plastic part done. Shipped as parts or assembled with QC.