They sent me, gratis, non-frozen tamales from El Salvador. They sell pupusas too, and with improved technologies:
The retort process uses a combination of heat and pressure to “sterilize” the foods, which are sealed in special pouches similar to military MRE’s (but ours taste a lot better 🙂 ).
They were excellent (I knew immediately when I smelled them) and no artificial preservatives are required. They will deliver to your door and their web site is here. I am told there is a 30 percent off discount with use of the code TCowen30; I receive no kickback.
Don't forget the white sour cream.