I can provide you with Excel files of major raw material suppliers. You might not want China as a supplier, unless you plan to do excessive lead testing (IMHO), but if the supplier is in China, you'll get it in the report. I can safely say 70 suppliers will be on this Excel sheet, but I am aiming for beyond 200 suppliers.
I have extensive knowledge in manufacturing for herbal supplements and aromatherapy, but not so much powder-based supplements. I am familiar with FDA regulations, and can warn you of possible Fixed and Variable costs for future projects. My future fees are $25/hour as I am an importer with MBA-level knowledge.