How would I find information on a mediator for a cosmetic company mainly in market research and development?

Try some trade websites. Post a buy lead. Or when you log on and register at any trade sites, type in cosmetics in their search engine. Lotta options will pop up. You also, type in the country u are in. This way, u wont have to search in other countries. Be careful there are lotta frauds out there. Dont pay anything upfront at all.