You can find Levi's in almost every department store,like Macy's,Robinson's May...and so on. South Coast plaza got a Levi's shop. About LeSportsac,I think it's not easy to be found in LA; Fifth Ave. department store(South Coast plaza or Beverly Hill) probably has some;also,there is a LeSportsac shop in LAX airport(not DFS),but less styles than in Taiwan.
LeSportsac in Taiwan is much much prettier than in LA. I've been try to buy some LeSportsac bags for my friends,finally,I gave up.