What you could try is to get both the support of a
Doctor and a physio therapist
saying that you would benefit from these units. (that
would mean getting a letter
from both on letterhead and not just a note scribbled on
a prescription pad).
Both of the persons would have to go into great detail
as to what physically
affects you to the extent of requiring this type of
therapy on a regular basis,
as these can be quite costly depending on what you want
to get.
Hope what info I have offered is of
benefit.
Charmaine