In search of girlfriends birth brother

Hello My name is Travis, For the last 7 years i have been helping my girlfriend search for her brother that was born somewhere in LA. all we know is birth mothers name , that he was called steven before the adoption and he could have some deformities .... the birth mother had the same deformities on her hands and toes which was that the fingers and toes was fused togather ....the adoption was performed by a attorney . the birth mothers maiden name was Rhonda jewel mclaughlin, but her name at the time was Farmer .she passed away in 1992 due to ovarian cancer.. becuase of the fact that she passed away of cancer and my girlfriend had precancerous cells, we feel the he should be informed of the medical problems ...if anyone can help please contact me @ dillberg_7@yahoo.com thank you Travis