Looking for a flyer box delivery company in Raleigh -- does this area have such a thing?

I have a local client here in Charlotte who needs postcards delivered to neighborhoods in Raleigh. We have at least a half dozen flyer box delivery companies in our area over here, but can't seem to find any in Raleigh. Do you all have this as an option for direct mail, or do you only have tradtional mail? My client really wants to use flyer box delivery to keep the costs down -- if anyone has the name of someone who does this, can you send me their contact information?  Thanks!

Kary Gregor