Looking at it the backboxes themselves are pretty much the same but the hangers are slightly different and the center box is pretty much the same too, the website Raynkar gave me is very useful. Unfortunately i cannot find the bore sizes but the other information has been very useful. I thank everyone.
In conclusion fitting a diesel exhaust would work but i would need to move the hangers and that means paying someone to do it anyway so i will probably end up just getting a custom built from powerflow.