I have a Whole Food nearby and our chain grocery has a decent natural foods section. (101cookbooks.com)
Unless you have access to a natural food store or your local store has a good natural foods section, you're not likely to have much success in your search. (naturalfamilytoday.com)
I personally get my nutritional yeast from Organic Garage, but you may be able to find it in your local Bulk Barn or in the organic / natural foods section of your local grocery store. (ohsheglows.com)