I know of an excellent workshop for body works in your area, its called AM Autotech, its just before the Korangi flyover on the left behind the Eurocars centre,
the area is a bit hard to get to and has a horrid access road but their body work is excellent, and they have a bake paint booth so paint is also good as new,
they often restore old cars and a lot of bigger workshops outsource the bodywork and paint to these guys,
a bit pricey but worth it,
you can give him my reference, the owners name is Malik, everyone calls him Malik bhai, his number is 03332102354.