These often carry holy basil (Tulsi) for ritual or medicinal use. Note that the Indian varieties (like Rama or Krishna ) may have a slightly different flavor profile than the Thai variety.
Markets with a strong Thai or Southeast Asian focus are your best bet for fresh holy basil. Look for "Kaprao" on the label.
You can find holy basil (also known as ) through various sources, though it is often more difficult to locate fresh than the common Thai sweet basil. Depending on whether you need it for cooking (like Thai Pad Krapow ) or for medicinal teas, you can look in the following places: Local Specialty Markets