I'd highly recommend heading up to northern VA. Face Shop and Tony Moly in Annandale have great products. Even Thingamajigs, which usually sells stationary and cute asian stuff, is starting to sell a few cosmetics now.

H Mart in Fairfax also has a few shops that sell some cosmetics, including some lotions and face washes in the home goods area.

Go grab some cute stuff, walk around Tysons mall, get some Korean bbq. Make a day trip out of it!