Ay Chung Now Sells its Chili Sauce!
Cool - Ay Chung Oyster Noodle has a shop on the west side of the old Sogo now (Zhongxiao East Road Section 4 Alley 17 Number 2, 2721-9899), complete with actual seating and a plasma TV! OK, they are open benches, but they are better than squatting way out at the Ximenting location.
They are also selling their notoriously spicy hot sauce (yay!). We bought a bottle to bring home, although interestingly it needs to stay refrigerated, so we'll have to check it in our bag and let the cold temperatures of the cargo hold keep the bacteria from getting too excited.