I know its an absolute pain in the neck buddy, but if you like the design of this could you not use it as a template and get one made up with 2.5" or 3" pipework, new boxes (jetex, longlife, magnaflow etc for example) and sell this one on. At least that way you get exactly what you want!
I was thinking this but im still 500 out of pocket and a week delay on the car now.. so ive s*** out both ways