Contact Furlong travel in UK. They are a husband and wife team, long in the travel business and very helpful and knowledgeable outside the 'norm' of usual vacations. Your request maybe a little outside their normal sphere but they have many years of experience of organising tours of this size and are just expanding their horizons from the private tour to broader spectrums. We have travelled with them and find they are extremely professional and knowledgeable. They may not be able to help directly but will know, or find out, people to help and a way to move forward.... If you are looking for help on the other hand side of the pond! Best wishes in this venture. They are off to a major travel fair on 5-8 November and shortly after off to Ecuador and Galapagos, but I am sure they will respond as soon as they can.