W114s are awesome. Shame to hear and see the carnage, also a shame to see it doing a burnout, that's no way to treat a stately and beautiful old girl! :no2: Have you tried contacting ASV Euro Car Parts, should have stuff. Bodywork is plentiful, lots of W114/W115's around and can find a wreck really cheaply. Even try MB spares in ACT, they ship stuff no probs at good prices. Rust in the boot is common as the seal gives way right under the rear window.
Overall though, she is lovely thing and if you look after her, she'll look after you and reward you every time you jump in. :cool: