Lafafa,
In agreement with storm,
it's highly unlikely for you to find a high quality original sports steering wheel in Karachi,
if you have friends or relatives abroad then the best option is to select one on line and ask them to bring it over the next time you visit,
in terms of quality of finish and durability, I find that momo steering wheels are exceptionally good,
I have been using one in my car since 3 months now,
however in terms of practicality,
once you get used to the smaller steering, its good fun but all other steerings feel like you're steering a ship, they feel huge,
initially however the smaller steering feels very wierd and uncomfortable but with time you get used to it and appreciate the better maneuverability,
my car has power steering, and the sports steering initially felt hard and lumpy,
I would strongly recommend against installing one in a car which already has a hard steering and no power steering.
As I assume you are aware, with the smaller steering the moment of the turn changes, due to the moment being closer to the vertical angle of energy, more effort is required in the smaller steering whereas with the larger steering, the lever force of the longer moment distance assist in lessening the power required. Please refer the diagram below: