I was sent to Moffett Janitorial Supply by the Parks and Recreation Department of Foster City. This is where they buy the rolls of plastic bags to use in their doggie bag stations around the park. I called first to make sure they had the rolls and was delighted to find the lady answering the phone was willing to go check to see if they had a case of 4 rolls. They did so I went and bought them. The "store" is really a storage space with a desk on one side. The nice lady used an iPhone with a Square attached. She could take my Visa card and email me the receipt. I am a happy customer!