I am not aware of any SPECIFIC preps for such an event, but general disaster preps would be helpful.
A meteor landing on or near Mona Island will trigger a 200' to 400' tsunami and a 12 earthquake. General preps will work.
Likewise aside from general preps there's no way to predict months and years ahead of time where an metorite/astroid could strike, especially a small one that may not even have been detected.
On or near Mona Island. I don't know when.
Jeanette Isabelle