Does Walmart have Tahini (sesame paste)?
You can also find some good ones in Costco ... but you can find them at any grocery store and Wal-Mart. I don't add tamarind when I make hummus and it tastes great ... you can add garlic, red pepper, pine nuts ... whatever flavor you want to eat.
Most super walmarts have sesame paste, but it's not called tahini. Tahini is a mixture of sesame paste, yogurt and spices, often used as a sauce or garnish. See International Food Distribution.
You have it in my house, but I don't put it in my hummus. I cooked some garlic and then added it to the blender with a little olive oil and parsley.
I am Australian, but it would be wrong to assume that when you fail everything you can find it in the health food section. Otherwise, try the market or the daily.