Every Trader joe is different, but it's with the cold food, usually near the cheeses. Not always in all right together, but not hard to find. There are yogurt ones, cream cheese ones, sour cream ones, hummus types, eggplant. Never tried one I didn't like.
If you want lunch box, I just remembered that CostCo sells cream cheese in those little 1-ox foil packets. They are with the cheeses, and some in bags of about a zillion. That's a great way to go for convenience.