Yeah can find new ones online, was just hunting for a cheaper secondhand tyre first. Facebook marketplace Melb has none currently.
So I've tried the 3.0" nobby nics, then some cheaper Kenda Havocs in 2.8" i picked up but have settled on a 2.6 Nobby Nic in the rear, and looking for something a bit better than the Kenda up front. Would go 2.6" front and rear but BB height + crank length + 120mm travel mean I need to keep the front a bit higher.
The 3.0" Nobby Nics felt like balloons to me, the 2.8" Kenda felt better but being cheap/weak tyres aren't up really up to the task.