dubia roaches are a good alternative. It seems horrible but they breed really easy, dont smell at all, and are actually really nutritious. Order a few breeders then just feed and water them, and clean out their container every month or so. Also silk worms and wax worms, but those should only be used as treats really. Why no crickets though? It would seem crazy to get rid of your leos just because you didnt want to feed them crickets.