Only restaurants sell hot and sour soups ready made. No such thing as canned hot and sour soups. There are other more traditional options in dry instant forms, such as ramen type or seaweed soups. To make your own is really easy and ingredients to make it are available. Please check online recipes. Cafe Vie next door will have stuff you can try out, because they are a food court / fast food style - ish restaurant. Same owner if not mistaken.
They sell a concentrated mix, kind of like bouillon for chicken broth. It comes in a can of dry granular ingredients. I've used it. It's yummy. It's simple.
Yes you can make it at home. Not sure how but the lady that owns the place could tell you. ;~)
This is not a place you can buy hot and sour soup. You can buy packaged Ramen you can buy uncooked noodles, you can buy vegetables and many other Asian products.
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