I've heard a lot on various communities about using http://spinningbabies.com/ to get their babies go from breech/transverse into proper position. No exterior manipulation - just some exercises that can help.

Maybe try one or two? I don't think they can hurt (like the inversions) and you might be able to get the baby to turn sans ECV.

This is one of my big worries - so! You have my utmost empathy! I bet he will flip. Good niblit!

N.