I have and have used the Bengali FSI course, that must date from the early 1970s. I have the tapes and the book, and if someone wants it I could scan and turn them into pdf and digitize the tapes. I don't know who is responsible and how these get done, but I am willing to contribute this.
I have also used several Nepalese texts, notably a good Peace Corps text, and I have already digitzed its audio. The author is still selling that in Kathmandu.