Chances are, with stronger Braxton-Hicks contractions in this last month, the baby will turn on its own. After all, that's one of the reasons for the stronger BH contx - to "smooth" baby into better positions.
I had a client who had a history of preterm birth with her first, and with her 2nd, the baby was transverse until 38 weeks. I think it was helping to keep her sane - and staying off the cervix. Perhaps there would be some emotional concerns that the mother has that the baby is protecting her from...?
Anyway, positions help - like no bending at the waist, knees lower or at the same level as the hips. Some moxabustion, chiropractic, or even homeopathic Pulsatilla wouldn't hurt anything.
Only if we got to 38 weeks or so with no success in other methods would I look into an external version. A nice full body massage before, then some valerain root to help relax abdominal muscles, then gently nudge baby while an assist listened to heart tones throughout.