Nope, Vegimite is available in the UK and NZ, but probably only to satisfy the ex-pat Australian population...

I imagine the manufacturing plant for this and Marmite being similar to a Coke plant. I once went to one of these, and the tour guide described the secret formula mix in the anonymous plastic container as similar to the contents of a smokers lung...I haven't drunk the stuff since. I vaguely recall that one 25 litre container of concentrate made about 10,000 litres of Coke.