DDG (distillers dried grains) is real popular here, but we have a lot of ethanol plants in the area.
Really, any substitute is getting bought up and used too right now, so won't be many deals.
I hear a fair number of folk with the barren/ less than 10 bu corn are making it into silage and hope to feed calves over winter on it, and hit the expected higher cattle prices next year. They still need to add some energy to that from somewhere, but the silage is a better feed value than just a roughage. Donno how that plan will work out.