Try the squeaky wheel routine, Lilitalia. You and your friends should send the llibrary e-mails asking for more ASL texts.
For example: It may have been coincidence, but after I asked people here at AD to send e-mail to American Movie Channel about their hit-and-miss closed captioning, within six weeks all movies were closed captioned instead of just a few.
As to libraries, when I moved to Albany, its city library had one ASL text and one SEE text, neither very up-to-date. I asked the librarian, and she told me that there must not be many deaf patrons (library terminology for customers).
I started a modest e-mail campaign based on the idea that ASL books aren't only for deaf patrons, just like dictionaries aren't only for good spellers. We have a dozen sign books now, some on display.