Found this one last night, bought one this morning. Before posting :)
Gerni Compact Patio Cleaner $10 (it is the same as the Gerni Classic Patio Cleaner Attachment listed) - I think the description is wrong though, it says 10 times faster, should be 4x faster. I think they copied the description of the Plus version (at $99).
Bunnings is $49.90
Also under chassis nozzle for $5
Bunnings is $19.90
The Supercheap Auto site has both listed twice at different prices, Under chassis nozzle at $5 and $20.32
Compact/Classic Patio Cleaner at $10 and $49.93, I chose the cheaper price.
Upon opening the Patio cleaner packaging, its pretty simple, looks like it is worth $10, would not want to pay more.
I do not believe is part of their catalogue sale.
Did buy this too from the current catalogue;
Blackridge Air Tyre Inflator with Gauge
at $9.95 from $37.97.