Had vaginal delivery of a footling breech last year. Second baby, so a 'proven pelvis' (first was cephalic vaginal) and after failed ECV at 37 weeks when I said I wanted a breech birth, I was 'supported' by consultants in as much as it is NHS policy to support a woman's choices. A caesarean was not ever suggested, only vaguely alluded to by more pessimistic midwives.
Made arrangements with the Labour Ward at 38 weeks for various requests such as an active birth room and no continuous foetal monitoring, and midwives were forewarned so that the most experienced one on shift would come to attend me.
On the day, had a wonderful midwife who was lovely and calm, though unfortunately had a rather nervous consultant attending who put me off a bit towards the end. I totally stayed off the drugs to try to be better in tune with how my body was telling me to do it. My very best friend also had a planned vaginal breech birth in an MLU 3 weeks ago. I hope that knowing that I had done it (and how otherwise unextraordinary I am!) gave her confidence and belief in the actual normality of breech birth.
Get yourself informed, make arrangements with your midwives/consultants/hospital and show that you know what you're talking about, if it's really what you want. Also, perhaps consider hiring a doula for an extra player on your team. To be honest, I wasn't really right on about vaginal breech although I knew my body could do it given the right surroundings, I was just terrified of C-section and at the last minute was lucky enough to find the right women gathering round to support me.
Though of course...maybe your baby will still turn. Either way, I hope you find what you need.