My wife loves the standard Master Foods "Australian Mustard" and we stock up on it (ten or twelve jars) whenever we go but I always buy a jar or two of the hot english too.
FWIW I always stock up on Cussons Imperial Leather (the soap) whenever we go too.
Thats one heck of a barramundi. mmmm bush tucker. fried barramundi morton bay bugs piles of yabbies. and cold
vb's to wash it down with.....