Contact Harvey - 07814267961 He will make you one by hand and isn' stupid money. He has a jig for micra's as does alot for the grass track boys. If he doesn't know what it looks like he may want to see the car, which could be awkward for yo as he is near Aberystwyth which is a bit of a trek for you. (yeah I know nothing for the Aussies on here!)
He is retired from his exhaust business he used to have in the South East of England somewhere and has plenty of stories about how he made exhausts for just about every type of racing car from F1 down!
If yo don't fancy that there are stainless steel exhaust people around who will make you one.