Cougay-Boy if I was you before I would do anything about a new exhaust I would get a price from here.
http://www.trubendz.com/home.asp
They are acknowleged by all the Cougar guys in the states as supplying the best product. I think you will also find they are a fraction of the cost of getting a custom exhaust made here. They will supply the whole kit and all you have to do is find someone to install it which shouldn't be hard.
Let us know how you get on.