Niece & Nephew

I'm searching for my niece and nephew that were adopted by a Manhattan, NY couple... Jordan Savanna Lee (niece) was 5 at the time of adoption (DOB: 7/26/97) and Zachary Frederick Austin (nephew) was 3 (DOB: 1/2/99). Their last name at birth was Evans, born in Cape Girardeau, MO to Michael Eugene Evans, Jr. (DOB: 2/28/78) and Sylvia Jean 'Jeanie' (Ward) Evans (DOB: 8/2/79). Both had blonde hair and blue eyes. Zachary has a scar on his abdomen from surgery for Pyloric Stenosis when he was an infant. We believe they were adopted by a John (architect) and Johanna (freelance photographer) in Manhattan, NY. The adoption took place through a lawyer in Arkansas. We know they were placed in private school once in NY after being adopted. Looking for any and all leads possible! And if either of them see this, Squirt and Lil Man, your Aunt, birth mom, grandparents and cousins miss you like crazy!! We love you!!