There are two dealers for Nissan here in Lahore.
First up, you have made a wrong decision to put in kabli shocks. As far as hubs and other things go, if you find them in good nick, they should be okay to last a decade.
For the shocks, you will find Tokico as replacement parts which is a Japenese brand. Go ahead with them and you will be satisfied. For rear, do ask for gas ones. It might cost you between 8 - 10k.
Here are two main dealers.
Abid Autos, Montgomery Road. 04236312855
Munir Autos, Montgomery Road. 04236313842