There's one in Atlanta I haven't been to and a good one in Asheville NC. I'm not at home to try to post listings but if you search Asheville on FPN you should find discussions of that one.
None in SC... great... I wish there were pen shops in SC or even Georgia, id drive to Georgia even if it takes me 2 hours...
There are three in Atlanta - Artlite, MB boutique, and Total Fine Writing.
Windsor Jewelers in Augusta, GA carries Montblanc.
Mori's Luggage in Augusta also carries Montblanc, sparse selection of Waterman and Cross