Tony, I dont know if there is a source of exhaust pipes here in Australia, but I may be finding out soon, unless I can salvage mine! I tried for fitting this afternoon, and found one, possibly two problems.
The long pipe fits well, but the rear most straight section 'kicks' upward instead of remaining horizontal. This doesn't look right to me !?!
Secondly, when attaching the shorter piece I discovered it sits too far out from the exhaust manifold, and cannot be bolted. The gap is perhaps 4 inches. All may not be lost. In a case of serendipity, there could be sufficient length of the area that joins the two bits, to allow me to effect a rescue.
Guess I was rather optomistic to paint the pipes, eh! Typical.
P.S: Apologies for the average photos. They were taken by my tablet thingy, and I was in the process of trying to take better ones when I was called away quickly, to modify a 5ft brown snake! I say modify because I made a slight alteration to its length, making two considerably shorter black snakes from the original single one. Wretched things.