Hesperidin (and traces of hesperetin) can be found in large amount in citrus fruits, but also in some other fruits and some aromatic herbs and even in peanuts. The only product I can think of containing suitable amounts of hesperidin as well as gallic acid is honeybush tea (rooibos tea). Other combined foodstuffs could also be intersesting in this respect, e.g. teas with citrus extracts such as earl grey tea.