I haven't looked for CGM or soy meal there, but there's a farm supply store in Layton not too far from Hill Field Road. Petersen Farm Supply 825 East Highway 193.

Here is a link that might be useful: Petersen Farm Supply Details

i was able to get soy bean meal from IFA there is one located at Ogden 1470 Wall Avenue (801) 394-8831

the only place that i have found for corn gluten meal is steve regan. but they're in logan or slc

IFA locations
steve regan locations