Milled Part import companies and milled part import trade opportunities

We are looking for companies that can produce customer-specific milled and turned parts according to drawings. The quantities range from 10 to 100 pieces, for individual projects from 500 to 1000 pieces. The materials are stainless steel, steel and plastics (PVDF). Material certificates are usually required to guarantee authenticity. What can you recommend regarding the search process? Thank you and kind regards