The site on the link below is called "Origins Canada" ( supporting those separated by adoption )

Their "About" statement says...

"Origins Canada is a 100% volunteer-run non-profit organization serving people across Canada who have been separated from family members by adoption"

They have a lot of information and sources about post adoption issues and about Canadian post adoption research.

They also have information about sources for Canadian adoption records.

Hope that you find it useful.

http://www.originscanada.org/