Yes, I have a set of 2 tapes, 'Heal cavities, grow new gums,' and 'A revolution in oral health,' by Dr Robert O. Nara which I ordered 10 years ago from Oramedics Australia, P.O.Box 7372, Toowoomba M/C/ 4352, Queensland, Australia.
Not sure if the address is still current or not, it has been a decade... the phone no 076 357 248, fax 076363265.
Otherwise I guess you could try a search.
Good luck!