Well, there's always milk! Protein-fortified non-fat yogurt and other dairy foods have a lot of calcium. What about calcium-fortified orange juice? Manufacturers are adding calcium to quite a few products now, including breakfast cereal. Watch for new possibilities.
Calcium citrate may be more digestible in some forms than others, and of course this varies from person to person. I suggest you try the chews if that sounds like a convenient form, and see if they agree with you. Check the label for contents, which vary by brand. Usually the chews contain about 500 milligrams of calcium plus some vitamin D.