HP laptop Fan not working

The Fan of my HP DV6 laptop is not working. It's not because of the dirt because I use to clean it oftenly by blowing air. I need to know where should I go for buying a new or used fan incase it requires replacement. I can disassemble this machine and can replace the Fan on my own but don't know where to find such parts. Does anyone have any idea where to go for parts. Any particular shop or dealer in hafeez center or hall road?