Try ZD warriors(FB).
If not cheap and local, I would not bother and go buy a new sys.
I have a muffler delete pipe for 4WDSupacenter Dominator 8r SS 3" and the second pipe/flex joint section(total $80). These exhausts are made by Berklee, Vic. Contact: Rick van Berkel(owner) <rick@berklee.com.au>
https://www.berklee.com.au/contact.php
I use this exhaust sys but prefer a muffler fitted "have a stock muffler spare - no cost to you (had them make me up a 50% greater flow muffler).
Contact them see what dollars for dump pipe and last section (tail pipe) and get a price also for complete sys. Postage is the concern for second hand mate.
There are plenty 3" exhaust sys available for CRD on the market (new).