Where do you live? Perhaps one of the sponsors is close to you? Also check the classifieds of this site.
Good choices for feeders include: Dubia Roaches, Turkish Roaches, Madagascar hissing roaches, other roaches, crickets, silkworms, hornworms, kingworms (aka superworms), isopods, stick insects, grasshoppers, locust, moths, butterworms, flies....