The spice aisle is extraordinary. They have gum acacia. It's in 3.5 ounce bags and called "Edible Gum". It's from Deep Foods (Indian importer in New Jersey). They have mustard oil. And best of all they carry black and brown mustard seed. Please drop everything you are doing and go and shop there, now.
5994 W. Pico Blvd. Los Angeles, CA 90035 Tel. 323-931-4871