Need to update FSX to a previous AIRAC cycle

Hello, I'm trying to update the FSX NAV DATA to cycle 1911 in order to recreate a flight that took place during that cycle, and I would like to do it in the highest detail as possible. Since I'm using FSX's flight planner in order to use the ATC function, I need to update the sim's NAV DATA to that cycle but I can't find any source. The flight takes place in South America, if that's of any interest. I would highly appreciate if the publisher of these great updates would provide me the files for updating FSX to AIRAC 1911. Thanks in advance