We have 44ft x 25ft LED digital outdoor billboard on US-Mexico border in San Diego area. ( http://vi-ads.com/ )
It is right on the land border crossing with more than 46,000 cars / 137,000 people daily.
We have been trying to contact major brand companies as well as movie studios (full movies, tobaco, and alcohols are allowed, since in Mexico) but have not had much luck yet.
Is there any better way to find brokers or contacts for these major advertisers? Any input would be appreciated.