If you want second hand HONDA parts from Bilal Ganj, call Nadeem at 0300-4298985, a real gentleman. His price is at par with the market, but the stuff he'll give you will be pure Kabli.
If you're planning to buy anything new, which is from Montgomery Road, make sure you buy it from Honda House only as mentioned by KillerVtec. The rest are all rip - offs, especially for someone from another city.