Organic AP Flour Search

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I am looking for organic AP flour similar to Gold Medal organic  flour.  I want lower protein, at or below 10.5% and the flour must be organic.  Gold Medal organic AP works fine but the only way I have found it is in 5 pound bags at the retail level.  I hope to find 50 pound bags of something similar.  Does anyone know of anything? 

Thanks,   Jeff           (I am in Wisconsin)