I recently used Western Brake & Steering @ Pendle Hill, was referred to them by Hills Mustangs, contact number is - 02) 9636 4499
Found them well priced at $80, they knew what they were talking about, and were familiar with using shims, a few others I tried around the Hills area, either didnt know about shims, had never done LHD car, or wanted in excess of $150.00 for the wheel alignment.