After hunting on the internet for sources of "lawn feed", I resorted to picking up the phone and making calls. So far I have the following, all to the southeast of Raleigh:

Mule City Specialty Feeds 800.587.9229 Benson

soybean meal $0.21/lb 50# $10.50

cracked corn 50# $7.00

corn meal - will grind to meal if 500# or more, fee for grinding ($4.50 for 600#) + fee for bags, 600# total $86.95 or about $7.25 per 50#

Tractor Supply Fuquay-Varina

Alfalfa Pellets 50# $13.49

Rabbit Feed 50# $12.19

Cracked Corn 50# $7.29

Agri-Supply Garner

Alfalfa Pellets 50# $15.07

Rabbit Feed 50# $12.38

Cracked Corn 50# $7.73

Twin Oaks Feed and Supply 919.557.2297 Willow Springs

Alfalfa Pellets 50# $7.75

Cracked Corn 50# $12.25

Hudson's 919.553.3030 Clayton

Soybean meal 50# $13.99

Cracked corn 50# $7.99

Alfalfa Pellets 50# $13.99

CGM (they had it this past spring, forgot to ask when i called)

Please add to this list if you have other sources in this area. Particularly CGM for the spring.