78 series toyota diff exchange

hello i need to exchange my landcruiser ute diff. does anyone know where a good place is to purchase one from.
there used to be a place in rockhampton that had good deals on diffs and stuff. i think it was something like capricorn cruisers but i cant find it anywhere on the net.
i had a bad experience with gympy 4x4, they left a large bolt out of my landcruiser gear box i bought a few years ago and wouldnt admit fault , even after i x -rayed it to confirm it ......but thats another story , thanks.