I found this research, and it was conducted in Australia, and a skin biopsy was done. I realize that Australia is a continent, and this could be very far away, but perhaps people who are in need of the biopsies and have the means to get to this facility can contact them. They may not be offering them other than for research, but you never know. It also looks like they have an autonomic lab capable of some sophisticated testing.

http://brain.oxfordjournals.org/cgi/...ll/128/12/2797

Hope this has some potential to assist folks down under looking for leads.