Do you have em and just need to fit them or do you need to buy and then fit?
Coz local market is full of Chinese LEDs which are crap , i'd suggest buying from AUX led OR NovoSight or BiLED online and have them installed from anyone as they are just plug and play you can even install them on your own.
If you have the LED's just go to any good decoration shop they will fit them in 10 mins , if you are in rwp just go to saddar heera brothers and tell their electrician to fix them if you are near DHA Bahria PWD gulberg greens go to SuperCars on the link road between PWD and bahria , littlerly anyone can install LED bulbs if you have them.