Contact a dentist and get a referral to some oral surgeons. Then call the oral surgeons and see who has expertise. The oral surgeon is a SME on this stuff.
I think it will stay 9mm due to women in the mil. In country we played at the range with some of the cool guy gear and none of the women shot more than 1 mag through the SCAR due to recoil. I think a 40 cal would have the same effect.