SOLVED: Chef Asura Plikk won't sell skipped item

(Submitted in Game, here for others as a warning.)I bought the food form item from Plikk first and have closed her window and gone to my home instance before buying the gas infuser, and it appears now she won't sell the gas infuser because the achievement has its final item complete, even though the second last one was skipped.I had bought the second item as I thought the first item was the immersion thing still.Caution to others, buy these items in order.RESOLVED: Having (a second) sous-vide meat does indeed make the vendor window open and allow for the second item to be bought.

Make sure you have the requisite food item in inventory.