Where to buy Burger King Ketchup and Fries chips?

Someone brought these to school and I tried them and they tasted really good. When I asked her where she got them, she said her mom got it out of a vending machine for her. I wanted to know if there was actually a store to buy these chips at. I saw them once at a gas station, but I went back a week later and they weren't there anymore.I tried going to the dollar tree and the 999 cent store and it wasn't there. I live in Woodland Hills, Los Angeles, California, if that helps at all.