Do you need finished product or raw material? There are many ways (for raw material):
1) you can request a particular manufacturer in your own country to give you sample. In the letter you must explain why you need it and how it will be used (that is you will use it for research purpose and not for any commercial reasons). At the end of your research you should acknowledge their contribution.
2) In your country perhaps there are some raw material intending firms. Ask them. It is not that easy as you don't need bulk quantity I think.
3) You can send a mail to Johnson & Johnson detailing about the research you are going to conduct and request them to send you some raw material for your research purpose. I never did it before and I am not sure whether it will work or not.
4) Don't your university or research institute has a purchase department who manage these raw materials, chemicals, solvents, reagents etc? Ask them, give a requisition and they will do the rest.