Because of the WikiTree Honor Code which asks us to be mindful of the privacy of living people, you likely won't find much help here in G2G. One thing you can do on WikiTree is set the privacy on your profile to one of the yellow settings - Private With Public Biography - and make a note in your biography that you are looking for them. That way if they use Google to search for you, your intention to find them can be easily seen. Have you tried CousinConnect.com or AdopteeConnect.com? Both of those sites have privacy policies set up for searching for living people, and maybe users there can give you advice. Good luck!