Zungam only sells those items immediately after being released, or just prior to. After he walks to his final location, his vendor window swaps to regular weapons and armor. It's very odd and I can't tell if it is a bug or not. I found this out after trying in vain to use him to obtain the Cataclysmically Delicious achievement.
Its actually Invigorating Pineapple Punch that drops from deadmines, unless what is listed in the guide drops in normal deadmines.
What about Lunar Festival and its Festival Dumplings? I remember buying tons of these and taking months to consume them all. :3
I think you meant to have the food and the drink tab the other way around:
Kaja'Cola is also all over the Goblin starting zone (and is unbound, so anyone can ultimately get it).
That is what is listed from regular deadmines. The s have the same name and not much description. I will edit to clarify that you can loot different versions in the instances. Festival dumplings...I think they appeared outside the search parameters in the leveling list. Not sure why.
Oily Giblets and Unidentifiable Meat Dish are also sold by Gronk Hamcheeks as of 4.3. :)