Returning home to the U.S. holds very little appeal right now, and I definitely recall reading our embassy would not issue letters to apply for extension at immigration. Now it's a very painless online process to request a letter, and the auto-response says it will reply in two days after the application. I don't have high hopes for actually getting the extension w/out strong reason to be "unable to return" for health reasons or lack of flights, but I hope to try this week. See here for the site: