Hey mate welcome to the forum
No pic in your post?
Have a bit of a look through here
https://www.fordxr6turbo.com/forum/forum/112-exhaust-workshop/
Venom seems to have a fair few fans these days; price is very reasonable and quality is apparently pretty good
https://www.ebay.com.au/itm/Venom-FG-FGX-Turbo-Sedan-Turbo-Back-Exhaust-Falcon-XR6-FPV-F6-FORCE6-BARRA-/262466481624?hash=item3d1c38add8
@JETURBO may be able to help you out with pricing
Xforce is another option, nizpro is expensive - good quality but most hate their v band flanges, TOG is a cheaper nizpro copy, manta is very good quality but more exxy than nizpro...there are a few others but can't think of them right now.
Then there's the fleabay or scumtree 2nd hand lucky dip, as always you can either get a top deal or a turd.
Throw some pics up of your f6e when you get a chance.