Gary, the lowest current Aussie note is $5, but it's polymer, not paper.
Paper notes were replaced starting in the 80,s and are rarely seen now. I only have a few nice ones I kept for posterity.
$1 notes were replaced in 1984 by the MOR $1 coin, $2 notes were replaced in 1988 by $2 coin.
Would a polymer $5 note do instead?