Does anyone know a site/group or anything where I can find property owners.....

interested in getting a billboard on their commercial/industrial place. My company is looking for people in the metro Atlanta area? Is there a certain site, are their certain groups of people I should call(besides property owners,lol), any help would be great.

Skytorch Outdoor
Ashli Norton

I would call my title company and ask them to send me a list of industrial props in a certain area and then do a mailing.