Looking for my Mom's Birth Mother or Birth Siblings on the Big Island of Hawaii

I'm looking for my mother's birth mother who is said to be residing on the Big Island of Hawaii. My mother was adopted through Catholic Charities of Honolulu. Currently she is a resident of Honolulu, Oahu. She was born on March 19, 1956. I am hoping that a birth sibling of my mother reads this and make some sort of connection, as I'm doubtful that my mom's mother would be scanning the internet at her age. I will be forever grateful for any leads that anyone can offer.