Try these guys

http://www.perth4wd.com.au/imports.html

Real no BS Aussie service ie "What d'ya want?"
But they are reliable quick and do a great job

the 3 litre V6 in those is a real dog-many problems with heads etc. Very fuel hungry but a good strong gearbox.
If its in good nick better to get a kit from Marks 4WD adaptors and fit a holden V6. While the kit costs money the holden motor is only a few hundred bucks for a good one and they are strong and reliable. Probably going to cost a grand or more for the Toyota motor at least.