HotHands Cold Packs Wearables MediHeat Gift Packs Help Toll Free Order 800-748-9080 9 am-4 pm CST. Johnston Sales Co. P.O. Box 55707 Little Rock, AR 72215 Email: Johnston Sales Co Sales tax added for Arkansas residents only. Our credit card transactions are secured by: Order online or by fax 501-661-1199.