Swiftpoint Ergopoint Vertical Ergonomic Mouse, $29.95 USD (~$46.06 AUD)+ Delivery ($0 with $150 USD spend) @Swiftpoint US

Came looking for their Z2 mouse when I spotted this.
Down from an RRP of $89.90 USD.
Also available as a 3 pack for $69.95 USD, part of their Black Friday sales.