20 years ago I adopted my now ex's daughter that was 2 years old. Attorney said that we could use abandonment because it had been longer then a year since he had done anything or visited. Turns out we called him and ask if he would sign rights over, he said no problem. Easy as pie. 500.00 and a court date to get it legalized.
Here is his info.
T

The Law Office of Stephen H. Swift, PC

(719) 358-2993

733 E. Costilla St., Suites A & B, Colorado Springs, Co.

Hope this helps.
Roger