The older Jeeps are pretty neglected in oz spares wise. Someone might post a link but i think you might be better off shopping in the US and paying the shipping, it is usually cheaper than 'Australia Tax' anyway.
Morris4x4 are forum sponsors, have decent shipping rates / prices and have what you need.
Crush Sleeve:
https://www.morris4x4center.com/pini...r-3507575.html
Clutch Kit:
https://www.morris4x4center.com/8-25...kc825pctl.html