I think you can install push start, these units are available and you wont have problem installing push start.
Climate control unit that you have to find and replace with original. U can try Bilal gang or sher shah.
Other goodies like body kit is not available i tried few places in lahore, khi & sialkot but no luck.
Fog lights after market projection lights can be installed and would cost $$$
I would say just get a good security system
Check this out
You can get multimedia steering unit as well.
Btw your premio is 1.5 F or 1.8 X?