If your too paranoid to mail order, you could try a hardware store, electrical supplier, long ass drive to the closest hydroshop you can find (if one is not in your area). I am also sketchy about mail ordering, you never know in this strange world. Though never have I seen or heard of anyone getting in trouble, watched, questioned for mail ordering completely legal products.
Some people say that smoking weed makes them paranoid, I smoke weed to mellow out the paranoia???