Terrible news.  Supplies of Sanitarium brand Marmite are very scarce in New Zealand. What is the situation in Australia. Tense?  Or is the problem an urban myth?
Marmite, the original yeast spread, is meat free and is said to be unlike the UK product. It is much nicer than Vegemite which is a very serious statement by an Aussie. Sanitarium food company originated with the Adventists who are vegetarian, I understand.  The label states that Marmite is a rich source of Vit B complex, B12 and Iron which vegetarians and all of us need in our diet.