Steve,
I am certainly praying now for Barbi and Linda to be saved. How? I do not know but I am certain the Holy Spirit can and will find a way, a way that will I am sure surprise and delight us all. Do not be discouraged, nor downhearted about this seemingly desperate situation in your life. God can and does do many things that are miraculous from our point of view. You are a believer and have taken the first step in fulfilling your responsibility. Now, let go and step out of the way and let God be God. You do not know how this will end, but be assured it will be the best solution that you could ever dream of! Be of good cheer and do not fear. I will repeat that advice: DO NOT FEAR. God can do anything and will to help you, you have His word on that.
Love in Christ, Robert