Comment by vidarh

Here is a UK chain catering to black hair. Their page of products related to chemical relaxing (straightening) of hair alone has more than hundred products (sidebar on right):

http://www.pakcosmetics.com/hair-care/relaxer-n-texturizer/h...

And that's just one category of types of hair products that are rarely used on white hair.

That should give a slight idea of the referral opportunities..