External version is very risky, IMO. She has to be ready for an immediate c-section if the baby goes into distress. A much better answer is to find someone to work on the MOM and get body issues worked out (she likely has pelvic issues) that are keeping the baby from turning him/herself in the proper position. You've got a number of safe options that likely will be very successful: chiropractic (Webster technique), acupuncture, or an osteopath (specifically a cranial osteopath) who does hands-on manipulation all are options to get the baby to turn himself.
After I had two malpositioned babes, a great chiropractor in Annapolis who specializes in pregnant women's and children's care, Dr. Carol Phillips, worked out my pelvic issues during my third pregnancy, and that birth (after babe being transverse for many weeks) was much faster and much less painful than my previous two. www.dynamicbodybalancing.com If you call her, she may know another resource closer to you (are you in NY?) Btw, Dr. Phillips does workshops teaching her techniques---great for doulas and other birth professionals!
Best wishes to you and your friend!