How can I reach or contact online shop's buyers?

[yumemi]

I am trying to contact with online shop's buyers for one of my client. My client is trying to sell the product online shops, and asked me to contact them to ask if they can carry the product on their online shop.
We usually attend the trade show and meet buyers there, but not all of online shop buyers are attending the shows.
They usually do not have email address on their shop to contact either.
So how can I contact or reach them to introduce the product?

[travelmaster]

contact a psychic
you dont even name the company