LA/OC source for Mozart Chocolates?
Valley Produce in Reseda has a selection of various-sized boxes of Mirabel brand Mozartkugeln (or at least they had them last October). Some of the boxes also came with some flat disk-shaped chocolates (which I actually preferred to the regular round marzipan balls).
18345 Vanowen St
Reseda, CA 91335
(also another branch in Simi Valley)
You can also try the Alpine Market at the Alpine Village in Torrance (Torrance Blvd. exit off the 110 fwy). I was just there last week and saw all sorts of Mozart-brand chocolates. They are essentially like a more German/eastern European version of Cost Plus. There's tons of yummy packaged imported goods, including Mozart chocolates.