I saw their site the other day. I was amused to read the "Our Story" page, where it is confirmed that the store that sold these bags in NYC was indeed called "Chocolate Soup" (so as to prove I am not, in fact, insane and that my memory is still functional). Unfortunately, the bags are now selling for $190. I paid $90 for mine back in the mid 80's (which was a very high price to me, then).

Oh well, I think I'm going to buy one anyway!