Q. Do we have any access through Darden or elsewhere to Harvard Business School case studies?

Unfortunately, the full online database for Harvard Business School case studies is very expensive, so no. Some faculty buy individual cases for their students at McIntire and they are sold as course packets by the Bookstore. Sometimes faculty will put a case on reserve at a library, as well, and they will list them as "Available on reserve" on the syllabus if so.

This site might be a good place to search business cases by topic https://www.thecasecentre.org/main/

You can also try a purchase request for a single case, but that is not a sure thing, as they are sometimes treated as consumables, where every student is expected to purchase their own copy: https://www.library.virginia.edu/services/purchase-requests/

Here is the page for Case Studies on the Commerce subject guide, with contact information for the subject librarian for further questions: https://guides.lib.virginia.edu/c.php?g=514738&p=4031688