These are the companies you can contact by email, mail or by phone for coupons.
Keep in mind that not all of these companies will send you coupons. Some coupons are printable on their website.
Breyer’s Ice Cream
Bumble Bee Tuna
King’s Hawaiian Bakery
(My very favorite. They sent me coupons PLUS 16-oz round bread.)
(They will mail you $7 and $14 coupons)