Yep thats the one. Its called a hicas tie rod end. Its not a bush, its a ball joint. You'll prob have to call nissan or get one second hand. There could an aftermarket option also. I havent looked for hicas tie rod ends myself as i havent needed them. If you're in sydney, try Natetune. His number is 0403099461. He may be able to help you. Tell him Hamish told you to call.
To be 100% that is your problem, get someone to wobble the wheel and you look at the joint. If you see movement, then thats your prob! It will most likely be the problem as its common on all cars with age.
Hope that helps, Good luck!