I too am searching but for my grandfather Bernard J Rolf at St Josephs orphanage in 1900s. Mother Mary LeTourneau, He was born in 1906 not sure when he was adopted. Adopted by Rolf family in Freedom. I am being told record are sealed in Wisconsin post 1907, except for actual adoptee and parents are only ones who can obtain information.
Try to call the adoption records in madison 608-266-7163, also try Catholic Diocesean of Green Bay 920-437-7531 ask for adoption specialist-Child welfare Specialist. Last try Guarding Angels program 920-437-7531 ext 8186. Good luck in your search.