I just found this by searching, no experience with this outfit.
https://www.amazon.com/Coarse-Ground-Yellow-Corn-Meal-Bulk/dp/B00ZGR52BO/ref=sr_1_5_a_it?ie=UTF8&qid=1499888267&sr=8-5&keywords=50%2Blbs.%2Bcorn%2Bmeal&th=1