Looking for Half brother born in Aurora Il 1973-1974

This is hard for me to do, but I'm going to anyways. I have recently found out that my mom had a baby boy at Copley hospital (sp) in Aurora Il probably between 1973 and 1974. I have no information on his birthdate just due to the fact that my mom won't provide the info. I spoke with my grandma (who still lives in Aurora) and she couldn't remember the exact day or how old my mom was at the time. She does know the hospital. I want to let you know that my mom was not prepared to have a child at such a young age and has never forgotten her son. My grandma said that a nurse said he was the most beautiful little boy she ever saw. Due to the sensitive nature of this issue, my mom has never discussed it with me and I actually found out by accident from my older brother. I think it's neat that I have another brother and would love to find him, and I think my mom would love it as well. He may still be in the Aurora area or not, like I said I am working with little info. My mom's name is Mary and I asked my dad if he knew the fathers name and he believed his name was John Anderson (he and my mom did not get married). I just want to somehow find someone who knows something and can help me out. I hope he is still in the Aurora area because he has a whole lot of family that he doesn't even know, and who knows, he could be around the corner from my grandma or some cousins. I currently reside in Florida but my other brother goes to school at Loyola. So if you can help me out, let me know. If you know someone that was adopted in that time frame from Copley let me know!