Okay I have been at home today on and off the computer, well this is what I have done.
I have emailed the bmother that wants no contact she will probably never read the email but I sent it any way.

I told her in the email that I did locate the B father and that he passed away in March of 2006.
I would love to see the look on her face if she reads it. Yes this might have been cruel but I had a moment.
I felt that she should know that even without her help I did find him and he was a great man. Know I know that she will hate me even more

dumb move in weak moment