Sealed adoption with name change and address unknown

We have a situation where a child was baptized and a few years later was adopted outside the family. The adoption is sealed and although the family placing the child was able to meet the adopting family no last names or new addresses were allowed to be shared. To add to the dilemma the child's first name has been changed. All we know is the original name and where the child lived in our ward plus the new first name. We would love to be able to move the child's records to the new ward so they can make contact.

Any suggestions?

You can call CHQ, but I think you'll have to treat this as a "address unknown".