Thus far I've been unsuccessful in my quest.
Northeast L.A. preferable, but am also open to the westside and in between (so no South Bay recs please).
So far I've tried:
Albertson's (Los Feliz)
Vons (Eagle Rock)
Whole Foods (Glendale)
Super King (Glassell Park)
Surfas (available at Thanksgiving time/supplier can't get it either)
The manufacturer's customer service suggested Vons or Albertsons, but that was a no go, and I really don't need 4 boxes via mail order.