TRW brake pads are available at Koh e noor traders Saddar Rawalpindi, however I have no experience with them.
I would advise you to go for Frixa brake pads. Made in Korea.
I am using them in my Khyber and brake is very good, even in these Monsoon rains when the car has to pass through ponds of water on roads, the brakes are not producing any noises or loosing the grip. The rear shoes are of MK and they produce noise sometimes after passing through water.
Today during early morning rain, a dog comes in front of my car at Islamabad Expressway, I was at 80 Kmph and the car stopped well within time and avoided the collision.
I agree, the MK ones are crap. I was using them before Frixa.