This is the pic after the engine has been changed?
For exhaust (silencer) go-to jail chowrangi there are plenty of good shops there and do replace the whole exhaust from the front on the exhaust manifold to the back at the muffler.
My my you head lamps and indicators are in completely ruined.
For the seat belts and the head lamps you will need to go to shershah if you want OEM stuff at reasonable rates. You will find the seat belts that came with the car also genuine head lamps, indicators and rear lamps... The person to contact is Saeed Bhai, Gali No. 7 Shershah Market. You will also find the rubber seals of the windscreens and if available the proper condition original door cards. If the things are not with him he will tell you who has them.
Also try to find the rear metal panel under the bumper yours is completely ruined by idiot denter. Similarly the garnish on the doors should be fixed with clips behind then not stupid the screws which look hidious
Also were is the airfilter box intake extension pipe. My mechanic lost mine and I am still furious at him for this. Have you driven the car what is the performance? Also if you want to keep the car kindly take off the CNG!