I found a place that can special order the barley seed and kelp meal in the 50 lb bags. They are made by a company called o.h. Kruse grain and milling, anyone ever come across these and know If they're any good??There out of California I called them and they said that the barley seed and the kelp meal is not organic though and they don know if the seed is gmo or not, the kelp meal in a PDF on there website says dried kelp (ascophylum nodosum)
Kelp comes from the ocean and thus is not GMO.
Barley is another story, however unless Monsanto found it to be a worthwhile crop for monetizing by making it Roundup Ready or for some other pest resistance, it's unlikely that it's GMO either.