Just bought a pack from Woolies yesterday. i found it near the cake mixes and other baking products, but yes, it's no longer in a box, it's in a white foil packet. It might have disappeared from the shelves for a bit while the packaging was changed over.
Call up Woolies customer service. They should be able to tell you if the product is still available etc. We had this problem with a product that we could no longer find at Coles. They followed it up and tracked it down.... esp once I said, "No, it wasn't available for weeks" at various stores.
They moved it not longer ago to the aisle where cake mixes and sugar are. At my local woolies its on the bottom shelf under I think bicarb soda area. Stupid place but that's where I found it. Hopefully you will find it too.