The arms in your link are not genuine arms they are aftermarket, we only sell the genuine arm as the aftermarket ones we have tried do not last as long.
Drop me a PM if I can help, we also stock the Superpro bushes
I'm not sure if the 200SX fans would be the same, its a different part number to the Nissan ones. As Alex has said we have the Mishimoto fan shroud units but we also keep the OEM fan motors at a better price than Nissan.
http://www.clarkmotorsport.co.uk/parts/Cooling-Fan-Motor/21487-CD00A
In stock for next day delivery.
Ewen
The SuperPro bushes would outlast the rubber bushes but the OEM Nissan ones will still last 60k to 80k so it depends on how long you plan to keep the car.
We also sell the SuperPro bushes should you wish to go down that route.
Ewen