Here is your assignment:
Obtain a copy of any vidoetape, audiotape or anything whatsoever that has their picture or the sound of their voice. It may take some time, but it will be well worth it.
My friend, I lived this. When my parents cut me off, that extended to aunts, uncles, cousins even the grandparents. So I made it my goal to obtain the plethora of pictures (it turned out to be 950 plus) from my childhood. It took me 3 years and some damn fine detective work but I got them. Those pictures are my only link to what was.
This is where I see you now. There will come a day when they will want to get in touch with you. Until that day comes, move heaven and earth but obtain whatever visual and/or audio record that exists of your children. You will be amazed at how much a few seconds of video or a slide can mean. You will also be amazed at how healing it can be as well.
Chris