Thanks very much, Tony!
All this information from you fellows is valuable and greatly helps me to make the right decisions.
I had once investigated ordering one of these from USA, but cost of shipping was incredible. From memory, muffler was less than $90, shipping was more than $200! Bugger that.
It was a genuine Ford product too.
I downloaded these 3 photos at time of first contact with the vendor, but have lost where their I wrote down their web address. Can't order one now, even if I wanted to pay the roughly $300 it would have cost me!