If you can't wait, go inland mate. You'll find a good WB at a wreckers inland. No point ringing, you'll just have to go for a drive. Try places like towns near Dubbo, Gunndah etc. Take the whole firewall cut, through the pillars and under the joint at the floor-firewall. You'll find if you have a rusty cowl top, the under cowl will have rust too. Unfortunately the big wreckers out towards Nyngan is gone but there are others. Before you go, try Greg at Classicozwreck, not sure what good cowls he has left but he might have one.