I bet if you go to the grocery store and look in the freezer section .. they have frozen white castle burgers .. they come in a 2 pack. usually over where the pizza rolls are lol.
I never saw of Krystals until I moved to TN... I dont think they have a single one in NJ. I still havnt tried Krystals out tho. My husband doesnt care for white castle burgers, and he said thats what he thinks they'll taste like! We gotta try it out one of these days.