Bag of Chip Sizes

Hi- just purchased a new machine in MD. Our location is a state government office building. We stocked it today and did not feel comfortable selling the 1oz. Bags of Doritos and Lays chips. There is a store across the street that sells them for $.60. We could not find bigger bags at Costco or Sam’s. Anyone have any suggestions on where could find bags larger than 1oz? We want to actually make a profit and have a decent sized bag.