Jaap, in the meantime what about looking on Bevan Potter's site for Cansema?
Naturally, it is sold for animals, but I can attest to the fact that it
works on skin cancer in humans also.
http://www.centreforce.com/
Bevan Potter himself had skin cancer cured by Cansema after repeated
operations on his head failed to eliminate it. There are photos on a link
from the left hand margin "My Photos".
I got our Cansema from a vet in WA, but it was made in Qld and I think
originated from Centreforce.
All the best
Rowena in SW WA