Depending on your location there are several options.
1) A supermarket.  Parmesan cheese, along with all the other ingredients are commonly found in supermarkets.
2) A corner store.  While selection is often limited, a corner store may stock Parmesan.
3) A specialty food store.  You may find specialty food stores that focus on all manner of traditional or national cuisine.  The offerings at these stores may be different than the varieties available in other locations
4) Online shopping for food is a possibility.  Websites like Amazon.com have extensive grocery sections.
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