COngratulations on the new babies! and sorry to hear about the ones that went to the Rainbow Bridge
I'm sorry I don't have any advice for you on making the mother trust you, I haven't had this experience before. You could try talking softly to the mother, and try to touch her a little. But have lots of patience, when she finally trusts you to pet her, try touching her babies then. Good luck with them!
Please post pics ASAP!!!Can't wait to see them