How do you find someone's email address (only)for free?

I have a friend I lost contact with 10 yrs ago and I am desperately trying to find his email address I have wasted allot of money trying to find him but only find the wrong people.How can I find my old friends email for free?If anyone can help please tell me how or if you can find the email please reply. his name moustafa salamey nick name mike he was living in dearborn michigan last I heard he moved to canton michigan and owns abusinesss in annarbor michigan he does and or did work at ford motor company livonia michigan can anyone help me find only his email address?