If you see interesting sheet music please send a mail to the librarian/federation in question, see the website in question for the right mailaddress or general contact address of the federation.
You may search for music in the libraries of FASO and NASOL through ELISE (the EOFed Libraries Information Search Engine) https://elise.eofed.org/
IMPORTANT: If you find anything you would like to lend (not available in your own library) please ask your librarian to ask the librarian of FASO or NASOL if it is possible to lend.