I rarely see people using Notes on Facebook anymore. The Timeline format makes it less conducive for people to click the “Notes” app box.
I work with government agencies, too, so I know how difficult it is to convince them that the wheels of progress need to start turning. But I would suggest that if they WANT a blog, they need a reliable blogging platform (WordPress.org is my fave). They may be able to install the WordPress script so their blog displays as a page on their site, depending on the framework with which their website was designed.
If they’re not willing to use a standard blogging platform or to provide RSS capabilities, what’s the point of having a blog in the first place? No one will read it on Facebook, and they’ll be wasting their money and your time.