USG makes the Sof'n-Soil product that I am using and they also make a Ben Frankling Gypsum product (several).
Below is a link to a page that shows the Ben Franklin Gypsum products.
www.gypsumsolutions.com/brand.asp?brand=Ben%20Franklin
They also have a link to a list of distributors and there are a couple in NC. Not sure if that is close to you or not.
TNhunter
==
North Carolina
C.A. Perry and Sons, Inc.
4033 Virginia Road
Hobbsville, North Carolina 27946
Phone: (252) 221-4406
Fax: (252) 221-4457
BEN FRANKLIN 420 LANDPLASTER
Pitt-Martin Fertilizer Company
5961 US 264 East
Greenville, North Carolina 27834
Phone: (252) 752-6930
Fax: (252) 757-1160
BEN FRANKLIN 420 LANDPLASTER