ME/CFS doctor in Argentina?

A friend of mine with a diagnosis of ME/CFS needs to move (temporarily) to Argentina, the climate there will help his health, but due to covid travel restrictions he can't be allowed to fly there unless he proves that he has a medical condition that can be treated in Argentina but not where he comes from.
Does anyone know of a doctor in Argentina that could be willing to write a certificate that he needs go there to try Ampligen (since it's approved there for ME/CFS), that way he can be permitted to fly there?

Thank you