I'm sorry to say I'm not close, I assume you're in New South Wales correct? I'm all over the world, working as a traveling programmer but sad to say I'm never down under. The box is pretty noisy to be frank, it shifts well and all it's mainly bearing noise I guess.
I've done minor gearbox work before, mainly on Volvo and Triumph's (as in the car), but parts for those are easy to get hold of and so are manuals.
Interesting to see what u come up with.
https://cobratransmission.com/index.php?main_page=index&cPath=2_2065 list some rebuild kits..
Cheers J