Chassis Rail Rust Plate Repair

The chassis rail on my vehicle has progressed beyond simple surface corrosion—there is severe rust that is already compromising its structural integrity. I want the affected section fully cut out, a correctly-gauged steel plate fabricated, and then welded in to restore strength and safety... (Budget: $750 - $1500 AUD, Jobs: Automotive Engineering, CAD/CAM, Civil Engineering, Engineering, Local Job, Mechanical Engineering, Welding)