Hi,
it also depends on how flexible you are with travel.
Most dancers, that I know use private Sports Physiotherapists. It's only the really big dance schools (or travelling dance shows or musicals) that have their own Physio employed.
Try to contact local dance schools and ask which Physios they use, or contact a Sports Physician to see who he normally recommends. And then ask for a volunteer placement there.
Should you live in a big city, where musical shows are performed, you could try and contact their Physio, e.g. I know that the 'Lion King' show employs a whole group of Physios.
Good luck,
Fyzzio