"A Los Angeles Vietnamese spot whose owner has had difficulty sourcing rice paper wholesale after his preferred Three Ladies brand became unavailable due to a container issue. For the past two to three months he has been driving into the San Gabriel Valley weekly to buy retail rice paper, which raises ingredient costs by roughly 40–50% and imposes significant opportunity costs in time and traffic. He reports similar intermittently unavailable items such as vegetarian stir-fry sauce and gluten-free soy sauce, but considers sourcing rice paper essential because spring rolls are a non-negotiable menu item." - Bettina Makalintal