From what I read, there are many stores that carry them and also Amazon. Walmart, Target, and Bed ,Bath and Beyond and JC Penney. Also from this site too.
Stainless Steel Stock Pots and Storage Containers Product Family
Which store from in USA, i can get Stainless Steel Stock Pot?
Anywhere that sells pots and pans. I think mine came from Target. Depending on quality you can get them from Walmart to Macy's. From Williams and Sonoma to Amazon.