go back and pay the fucker a visit, ask for the money or remove goods to the value of.

thing is though its easy to do these days, rust is easy to bodge and cover up so non genuine sellers do it to make there cars worth more, same as anything else on a car really. it does seem solveable, looms can be got for around £50 and aint that hard to fit, just the welding thats gonna be exspensive. best thing to do is keep you eye out for another good genuine shell, they come up quite often as alot of owners break cars as there worth more in bits, and then transfer all your bit across. thats what i'd do anyway.