Even if you don't see a link for a sample, you can always email a company and ask.

I did some searching one day for websites on products I liked and ones that I wanted to try. (ok..itwas nighttime..back in my insomina days)

Must of the shamppo and soap makers will send a sample. I had bottles and bottles of products I had bought and couldn't use.

Even makeup samples. Something I still have problems with.