Plenty of turbo engines here in Brisbane for sale.
Dvs_mr2 - I am sure he has a gen2 turbo for sale cheap (his decided to go supercharged v6 but we won't hold that against him.
I thought a turbo engine (under $1000) gearbox shafts and hubs (under $1000) ancillaries like intercooler, wiring harness ECU tuneable (under $1,000), so you are left with budget to get upgrades.
I have pieces if you want a build project, 3sgte block at 86mm and 86.5, 3sgte crank or 5sfe if you want to build more torque, Pistons rods etc.