I don't know what to get my long lost family for Christmas?

Congratulations on finding your new family! I think that the photo album is a great idea, you should send it along with a letter to the whole family or maybe even a video of yourself talking to them telling them what you've been up to, how much you love your mother, and how happy you atre to see them. Maybe you can save for a trip to visit them and reconnect with family that you might need and love to have around sonce your mother's death. It could be comforting and just what you and them need!