Asking for a buddy here.
He's doing a startup that needs data from merchant in exchange to provide them lead of consumer.
He's doing store-by-store visit, but it's far too slow (a single person could visit 30-40stores per 8hr workday top). So, he's looking for a solution that'd lead to a quicker and broader exposure.
I thought maybe there's some sort of business listing/directory or even some marketing company that specializes in such a market. It doesn't have to be free. But apparently my google-fu wasn't strong enough.