I like to save some extra jelly packets when we eat out. They are shelf stable and need no refrigeration. Throw a couple of slices of bread on the grill, toast and add you favorite flavor. When dining at you favorite restaurant, ask for a few extra packs, and always top your waitress well for keeping you supplied. If you order take out, save the jelly packs and use your jar from the refrigerator.
Another source is the warehouse stores. They are large boxes, but you could always share with friends and neighbors.