My 2012 Octavia II FL Estate 2.0TDI 140BHP has just failed its MOT on a broken offside rear spring. The garage wants £280 inc vat to replace both rear springs with genuine spare parts. Each spring is quoted at £74 + vat. I know that I am perfecty capable of doing the job as I do my own servicing and repairs and I fitted MAD assister springs to the rear of the car soon after I had bought it. The problem that I am having is trying to buy new springs that are the same length and spring rate as the