Thank you for your reply sue!

We are in canada, so it is somewhat of a team approach. The doctors are all not in the same hospital, but can communicate if needed. My mom is followed by a transplant team who are encouraging her to have the surgery. She also has a special hip reconstruction dr who was referred from her original hip surgeon.
No other doctor was suggested, however infectious disease could be interesting to consult for prevention of infection possibly.

Her current hip Dr, despite being a trusted referral and seems very competent, says it is a very unusual case, and he doesn’t have much to comment on how she could be walking without hips right now.
If ever you know of any schools, or places that deal with very unusual hip issues, I would be willing to contact them and ask their opinion.