Boutique Estella is definitely your go-to if you are looking for LSU Game Day apparel. They have this adorable LSU tank top along with other adorable purple and gold items as well. They also carry Game Day apparel for other school colors, located here.
My custom Game Day clutches also come in many different purple and gold color patterns (not just LSU) . You can design your own custom Game Day clutch on my website or see more in my Etsy shop.