I know of a number of yachts that have had woodwork done at the boatyard at Porto de Cabedelo in Brazil. (just south of Recife). Ibelieve that there is a new "marina" about two miles upstream in the Canal de Velho, Cabedelo Nautico, run by an English person. The boatyard is at Jacare, about five miles upstream. I hav'nt an address for you, bet I am sure with an internet search you will find one. Another posibility could be Suriname, where I do have an address email@example.com
Hope this helps.