Hi Flex, hope you're well.
Well Melagenina plus was developed in Cuba, here is the link to the actual clinic.
http://www.histoterapia-placentaria.cu/clinicai.htm
That is where I had my treatment and where I got the medicine.
here is a description of what it is
Melagenina Plus ( Melagenina + Calcium Chloride ) is an
alcoholic extract of human placenta, a pharmacological product that can
increase the reproduction of melanocytes in the borders or inside the
acromic areas of the sick persons, as well as to accelerate the process
of production of melanin, that is why it has become a successful therapy
for Vitiligo.
Unfortunately North American doctors don't recognize this treatment, so there is no clinics in north america that I know of. Also buying anywhere that is not directly affiliated to the clinic may be dangerous as they sometimes water it down and therefore does not work.
Usually you are prescribed enough to last you a year ( medicine is used once a day, only in the affected areas), then you go back and re-asses your progress and get more medicine to take with you for another year.
Depending on your financial situation it may be a sacrifice to go there but its been worth it.