I order ours from McGeary Organics in Lancaster PA. They charge around $50
for a 50 pound bag and that includes shipping to your door. They have a web
site but don't advertise DE on it. You can call and ask for Laura Witmeyer
and request Food Grade DE and she knows what you need and is very helpful.
I then found a guy about an hour away that sells 50lbs for $19.00 so I will drive there next time. He is a distributor and would be able to direct you to one in your area if you called him I will look up the number and PM to you Lori