I have a few parts but not selling although I would like to give you some advice. The complete exhaust system from USA will cost $3500 landed. Perhaps even more. For the same money someone in Au can fabricate an exhaust system. I would be completely ok with making mine available for a template to follow to save a few $$$.
There is a guy in Victoria who makes the mount. Not sure if he has any available. His name is Charlie. Just need to look him up.
I made my own baffled sump 4 years ago which was almost the same as the Wilhelm one. You could do the same with a little bit effort.
There is a person in Melbourne who claims to know what he is doing with rewire. Do not use him. He is clueless. Talk with Eric Manderson in Qld as he has someone who can help with wiring.
Motorsport connections has all the fittings you will need to do fuel systems.
There are a few mods required to the gearbox to fit the 2GR. Not much just some work with the rotary file, a helicoil for the top gearbox mounting bolt.
If you need more help just let us know to see if someone can help.
Cheers