First, I love oats, hehe. Ground up in shakes, oatmeal, used as flower, etc. etc. I finally gave up on the grocery stores and found honeyville grain on line. http://www.honeyvillegrain.com/
You can buy just about anything in bulk here, including 50 pound bags of oats. Old fashioned, steel cut, pretty much anything. Oh, their prices are freakin' great, and they also sell big cans of powdered egg whites, LOL.